Delete the GTK+ port of Chrome.

chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/ui/gtk/tabs/tab_strip_gtk.h"
-
-#include <gtk/gtk.h>
-
-#include <algorithm>
-#include <string>
-
-#include "base/bind.h"
-#include "base/debug/trace_event.h"
-#include "base/i18n/rtl.h"
-#include "base/metrics/histogram.h"
-#include "base/strings/string_util.h"
-#include "base/strings/utf_string_conversions.h"
-#include "chrome/browser/autocomplete/autocomplete_classifier.h"
-#include "chrome/browser/autocomplete/autocomplete_classifier_factory.h"
-#include "chrome/browser/autocomplete/autocomplete_input.h"
-#include "chrome/browser/autocomplete/autocomplete_match.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/themes/theme_properties.h"
-#include "chrome/browser/themes/theme_service.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_navigator.h"
-#include "chrome/browser/ui/browser_tabstrip.h"
-#include "chrome/browser/ui/gtk/browser_window_gtk.h"
-#include "chrome/browser/ui/gtk/custom_button.h"
-#include "chrome/browser/ui/gtk/gtk_theme_service.h"
-#include "chrome/browser/ui/gtk/gtk_util.h"
-#include "chrome/browser/ui/gtk/tabs/dragged_tab_controller_gtk.h"
-#include "chrome/browser/ui/gtk/tabs/tab_strip_menu_controller.h"
-#include "chrome/browser/ui/tabs/tab_strip_model.h"
-#include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/user_metrics.h"
-#include "content/public/browser/web_contents.h"
-#include "grit/generated_resources.h"
-#include "grit/theme_resources.h"
-#include "grit/ui_resources.h"
-#include "ui/base/dragdrop/gtk_dnd_util.h"
-#include "ui/base/gtk/gtk_screen_util.h"
-#include "ui/base/l10n/l10n_util.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/gfx/animation/animation_delegate.h"
-#include "ui/gfx/animation/slide_animation.h"
-#include "ui/gfx/gtk_compat.h"
-#include "ui/gfx/gtk_util.h"
-#include "ui/gfx/image/image.h"
-#include "ui/gfx/point.h"
-
-using base::UserMetricsAction;
-using content::WebContents;
-
-namespace {
-
-const int kDefaultAnimationDurationMs = 100;
-const int kResizeLayoutAnimationDurationMs = 166;
-const int kReorderAnimationDurationMs = 166;
-const int kMiniTabAnimationDurationMs = 150;
-
-const int kNewTabButtonHOffset = -5;
-const int kNewTabButtonVOffset = 5;
-
-// The delay between when the mouse leaves the tabstrip and the resize animation
-// is started.
-const int kResizeTabsTimeMs = 300;
-
-// A very short time just to make sure we don't clump up our Layout() calls
-// during slow window resizes.
-const int kLayoutAfterSizeAllocateMs = 10;
-
-// The range outside of the tabstrip where the pointer must enter/leave to
-// start/stop the resize animation.
-const int kTabStripAnimationVSlop = 40;
-
-// The horizontal offset from one tab to the next, which results in overlapping
-// tabs.
-const int kTabHOffset = -16;
-
-// Inverse ratio of the width of a tab edge to the width of the tab. When
-// hovering over the left or right edge of a tab, the drop indicator will
-// point between tabs.
-const int kTabEdgeRatioInverse = 4;
-
-// Size of the drop indicator.
-static int drop_indicator_width;
-static int drop_indicator_height;
-
-inline int Round(double x) {
-  return static_cast<int>(x + 0.5);
-}
-
-// widget->allocation is not guaranteed to be set.  After window creation,
-// we pick up the normal bounds by connecting to the configure-event signal.
-gfx::Rect GetInitialWidgetBounds(GtkWidget* widget) {
-  GtkRequisition request;
-  gtk_widget_size_request(widget, &request);
-  return gfx::Rect(0, 0, request.width, request.height);
-}
-
-// Sort rectangles based on their x position.  We don't care about y position
-// so we don't bother breaking ties.
-int CompareGdkRectangles(const void* p1, const void* p2) {
-  int p1_x = static_cast<const GdkRectangle*>(p1)->x;
-  int p2_x = static_cast<const GdkRectangle*>(p2)->x;
-  if (p1_x < p2_x)
-    return -1;
-  else if (p1_x == p2_x)
-    return 0;
-  return 1;
-}
-
-bool GdkRectMatchesTabFaviconBounds(const GdkRectangle& gdk_rect, TabGtk* tab) {
-  gfx::Rect favicon_bounds = tab->favicon_bounds();
-  return gdk_rect.x == favicon_bounds.x() + tab->x() &&
-      gdk_rect.y == favicon_bounds.y() + tab->y() &&
-      gdk_rect.width == favicon_bounds.width() &&
-      gdk_rect.height == favicon_bounds.height();
-}
-
-}  // namespace
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// TabAnimation
-//
-//  A base class for all TabStrip animations.
-//
-class TabStripGtk::TabAnimation : public gfx::AnimationDelegate {
- public:
-  friend class TabStripGtk;
-
-  // Possible types of animation.
-  enum Type {
-    INSERT,
-    REMOVE,
-    MOVE,
-    RESIZE,
-    MINI,
-    MINI_MOVE
-  };
-
-  TabAnimation(TabStripGtk* tabstrip, Type type)
-      : tabstrip_(tabstrip),
-        animation_(this),
-        start_selected_width_(0),
-        start_unselected_width_(0),
-        end_selected_width_(0),
-        end_unselected_width_(0),
-        layout_on_completion_(false),
-        type_(type) {
-  }
-  virtual ~TabAnimation() {}
-
-  Type type() const { return type_; }
-
-  void Start() {
-    animation_.SetSlideDuration(GetDuration());
-    animation_.SetTweenType(gfx::Tween::EASE_OUT);
-    if (!animation_.IsShowing()) {
-      animation_.Reset();
-      animation_.Show();
-    }
-  }
-
-  void Stop() {
-    animation_.Stop();
-  }
-
-  void set_layout_on_completion(bool layout_on_completion) {
-    layout_on_completion_ = layout_on_completion;
-  }
-
-  // Retrieves the width for the Tab at the specified index if an animation is
-  // active.
-  static double GetCurrentTabWidth(TabStripGtk* tabstrip,
-                                   TabStripGtk::TabAnimation* animation,
-                                   int index) {
-    TabGtk* tab = tabstrip->GetTabAt(index);
-    double tab_width;
-    if (tab->mini()) {
-      tab_width = TabGtk::GetMiniWidth();
-    } else {
-      double unselected, selected;
-      tabstrip->GetCurrentTabWidths(&unselected, &selected);
-      tab_width = tab->IsActive() ? selected : unselected;
-    }
-
-    if (animation) {
-      double specified_tab_width = animation->GetWidthForTab(index);
-      if (specified_tab_width != -1)
-        tab_width = specified_tab_width;
-    }
-
-    return tab_width;
-  }
-
-  // Overridden from gfx::AnimationDelegate:
-  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE {
-    tabstrip_->AnimationLayout(end_unselected_width_);
-  }
-
-  virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE {
-    tabstrip_->FinishAnimation(this, layout_on_completion_);
-    // This object is destroyed now, so we can't do anything else after this.
-  }
-
-  virtual void AnimationCanceled(const gfx::Animation* animation) OVERRIDE {
-    AnimationEnded(animation);
-  }
-
-  // Returns the gap before the tab at the specified index. Subclass if during
-  // an animation you need to insert a gap before a tab.
-  virtual double GetGapWidth(int index) {
-    return 0;
-  }
-
- protected:
-  // Returns the duration of the animation.
-  virtual int GetDuration() const {
-    return kDefaultAnimationDurationMs;
-  }
-
-  // Subclasses override to return the width of the Tab at the specified index
-  // at the current animation frame. -1 indicates the default width should be
-  // used for the Tab.
-  virtual double GetWidthForTab(int index) const {
-    return -1;  // Use default.
-  }
-
-  // Figure out the desired start and end widths for the specified pre- and
-  // post- animation tab counts.
-  void GenerateStartAndEndWidths(int start_tab_count, int end_tab_count,
-                                 int start_mini_count,
-                                 int end_mini_count) {
-    tabstrip_->GetDesiredTabWidths(start_tab_count, start_mini_count,
-                                   &start_unselected_width_,
-                                   &start_selected_width_);
-    double standard_tab_width =
-        static_cast<double>(TabRendererGtk::GetStandardSize().width());
-
-    if ((end_tab_count - start_tab_count) > 0 &&
-        start_unselected_width_ < standard_tab_width) {
-      double minimum_tab_width = static_cast<double>(
-          TabRendererGtk::GetMinimumUnselectedSize().width());
-      start_unselected_width_ -= minimum_tab_width / start_tab_count;
-    }
-
-    tabstrip_->GenerateIdealBounds();
-    tabstrip_->GetDesiredTabWidths(end_tab_count, end_mini_count,
-                                   &end_unselected_width_,
-                                   &end_selected_width_);
-  }
-
-  TabStripGtk* tabstrip_;
-  gfx::SlideAnimation animation_;
-
-  double start_selected_width_;
-  double start_unselected_width_;
-  double end_selected_width_;
-  double end_unselected_width_;
-
- private:
-  // True if a complete re-layout is required upon completion of the animation.
-  // Subclasses set this if they don't perform a complete layout
-  // themselves and canceling the animation may leave the strip in an
-  // inconsistent state.
-  bool layout_on_completion_;
-
-  const Type type_;
-
-  DISALLOW_COPY_AND_ASSIGN(TabAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-
-// Handles insertion of a Tab at |index|.
-class InsertTabAnimation : public TabStripGtk::TabAnimation {
- public:
-  InsertTabAnimation(TabStripGtk* tabstrip, int index)
-      : TabAnimation(tabstrip, INSERT),
-        index_(index) {
-    int tab_count = tabstrip->GetTabCount();
-    int end_mini_count = tabstrip->GetMiniTabCount();
-    int start_mini_count = end_mini_count;
-    if (index < end_mini_count)
-      start_mini_count--;
-    GenerateStartAndEndWidths(tab_count - 1, tab_count, start_mini_count,
-                              end_mini_count);
-  }
-  virtual ~InsertTabAnimation() {}
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual double GetWidthForTab(int index) const OVERRIDE {
-    if (index == index_) {
-      bool is_selected = tabstrip_->model()->active_index() == index;
-      double start_width, target_width;
-      if (index < tabstrip_->GetMiniTabCount()) {
-        start_width = TabGtk::GetMinimumSelectedSize().width();
-        target_width = TabGtk::GetMiniWidth();
-      } else {
-        target_width =
-            is_selected ? end_unselected_width_ : end_selected_width_;
-        start_width =
-            is_selected ? TabGtk::GetMinimumSelectedSize().width() :
-                          TabGtk::GetMinimumUnselectedSize().width();
-      }
-
-      double delta = target_width - start_width;
-      if (delta > 0)
-        return start_width + (delta * animation_.GetCurrentValue());
-
-      return start_width;
-    }
-
-    if (tabstrip_->GetTabAt(index)->mini())
-      return TabGtk::GetMiniWidth();
-
-    if (tabstrip_->GetTabAt(index)->IsActive()) {
-      double delta = end_selected_width_ - start_selected_width_;
-      return start_selected_width_ + (delta * animation_.GetCurrentValue());
-    }
-
-    double delta = end_unselected_width_ - start_unselected_width_;
-    return start_unselected_width_ + (delta * animation_.GetCurrentValue());
-  }
-
- private:
-  int index_;
-
-  DISALLOW_COPY_AND_ASSIGN(InsertTabAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-
-// Handles removal of a Tab from |index|
-class RemoveTabAnimation : public TabStripGtk::TabAnimation {
- public:
-  RemoveTabAnimation(TabStripGtk* tabstrip, int index, WebContents* contents)
-      : TabAnimation(tabstrip, REMOVE),
-        index_(index) {
-    int tab_count = tabstrip->GetTabCount();
-    int start_mini_count = tabstrip->GetMiniTabCount();
-    int end_mini_count = start_mini_count;
-    if (index < start_mini_count)
-      end_mini_count--;
-    GenerateStartAndEndWidths(tab_count, tab_count - 1, start_mini_count,
-                              end_mini_count);
-    // If the last non-mini-tab is being removed we force a layout on
-    // completion. This is necessary as the value returned by GetTabHOffset
-    // changes once the tab is actually removed (which happens at the end of
-    // the animation), and unless we layout GetTabHOffset won't be called after
-    // the removal.
-    // We do the same when the last mini-tab is being removed for the same
-    // reason.
-    set_layout_on_completion(start_mini_count > 0 &&
-                             (end_mini_count == 0 ||
-                              (start_mini_count == end_mini_count &&
-                               tab_count == start_mini_count + 1)));
-  }
-
-  virtual ~RemoveTabAnimation() {}
-
-  // Returns the index of the tab being removed.
-  int index() const { return index_; }
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual double GetWidthForTab(int index) const OVERRIDE {
-    TabGtk* tab = tabstrip_->GetTabAt(index);
-
-    if (index == index_) {
-      // The tab(s) being removed are gradually shrunken depending on the state
-      // of the animation.
-      if (tab->mini()) {
-        return animation_.CurrentValueBetween(TabGtk::GetMiniWidth(),
-                                              -kTabHOffset);
-      }
-
-      // Removed animated Tabs are never selected.
-      double start_width = start_unselected_width_;
-      // Make sure target_width is at least abs(kTabHOffset), otherwise if
-      // less than kTabHOffset during layout tabs get negatively offset.
-      double target_width =
-          std::max(abs(kTabHOffset),
-                   TabGtk::GetMinimumUnselectedSize().width() + kTabHOffset);
-      return animation_.CurrentValueBetween(start_width, target_width);
-    }
-
-    if (tab->mini())
-      return TabGtk::GetMiniWidth();
-
-    if (tabstrip_->available_width_for_tabs_ != -1 &&
-        index_ != tabstrip_->GetTabCount() - 1) {
-      return TabStripGtk::TabAnimation::GetWidthForTab(index);
-    }
-
-    // All other tabs are sized according to the start/end widths specified at
-    // the start of the animation.
-    if (tab->IsActive()) {
-      double delta = end_selected_width_ - start_selected_width_;
-      return start_selected_width_ + (delta * animation_.GetCurrentValue());
-    }
-
-    double delta = end_unselected_width_ - start_unselected_width_;
-    return start_unselected_width_ + (delta * animation_.GetCurrentValue());
-  }
-
-  virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE {
-    tabstrip_->RemoveTabAt(index_);
-    TabStripGtk::TabAnimation::AnimationEnded(animation);
-  }
-
- private:
-  int index_;
-
-  DISALLOW_COPY_AND_ASSIGN(RemoveTabAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-
-// Handles the movement of a Tab from one position to another.
-class MoveTabAnimation : public TabStripGtk::TabAnimation {
- public:
-  MoveTabAnimation(TabStripGtk* tabstrip, int tab_a_index, int tab_b_index)
-      : TabAnimation(tabstrip, MOVE),
-        start_tab_a_bounds_(tabstrip_->GetIdealBounds(tab_b_index)),
-        start_tab_b_bounds_(tabstrip_->GetIdealBounds(tab_a_index)) {
-    tab_a_ = tabstrip_->GetTabAt(tab_a_index);
-    tab_b_ = tabstrip_->GetTabAt(tab_b_index);
-
-    // Since we don't do a full TabStrip re-layout, we need to force a full
-    // layout upon completion since we're not guaranteed to be in a good state
-    // if for example the animation is canceled.
-    set_layout_on_completion(true);
-  }
-  virtual ~MoveTabAnimation() {}
-
-  // Overridden from gfx::AnimationDelegate:
-  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE {
-    // Position Tab A
-    double distance = start_tab_b_bounds_.x() - start_tab_a_bounds_.x();
-    double delta = distance * animation_.GetCurrentValue();
-    double new_x = start_tab_a_bounds_.x() + delta;
-    gfx::Rect bounds(Round(new_x), start_tab_a_bounds_.y(), tab_a_->width(),
-        tab_a_->height());
-    tabstrip_->SetTabBounds(tab_a_, bounds);
-
-    // Position Tab B
-    distance = start_tab_a_bounds_.x() - start_tab_b_bounds_.x();
-    delta = distance * animation_.GetCurrentValue();
-    new_x = start_tab_b_bounds_.x() + delta;
-    bounds = gfx::Rect(Round(new_x), start_tab_b_bounds_.y(), tab_b_->width(),
-        tab_b_->height());
-    tabstrip_->SetTabBounds(tab_b_, bounds);
-  }
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual int GetDuration() const OVERRIDE {
-    return kReorderAnimationDurationMs;
-  }
-
- private:
-  // The two tabs being exchanged.
-  TabGtk* tab_a_;
-  TabGtk* tab_b_;
-
-  // ...and their bounds.
-  gfx::Rect start_tab_a_bounds_;
-  gfx::Rect start_tab_b_bounds_;
-
-  DISALLOW_COPY_AND_ASSIGN(MoveTabAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-
-// Handles the animated resize layout of the entire TabStrip from one width
-// to another.
-class ResizeLayoutAnimation : public TabStripGtk::TabAnimation {
- public:
-  explicit ResizeLayoutAnimation(TabStripGtk* tabstrip)
-      : TabAnimation(tabstrip, RESIZE) {
-    int tab_count = tabstrip->GetTabCount();
-    int mini_tab_count = tabstrip->GetMiniTabCount();
-    GenerateStartAndEndWidths(tab_count, tab_count, mini_tab_count,
-                              mini_tab_count);
-    InitStartState();
-  }
-  virtual ~ResizeLayoutAnimation() {}
-
-  // Overridden from gfx::AnimationDelegate:
-  virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE {
-    tabstrip_->needs_resize_layout_ = false;
-    TabStripGtk::TabAnimation::AnimationEnded(animation);
-  }
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual int GetDuration() const OVERRIDE {
-    return kResizeLayoutAnimationDurationMs;
-  }
-
-  virtual double GetWidthForTab(int index) const OVERRIDE {
-    TabGtk* tab = tabstrip_->GetTabAt(index);
-
-    if (tab->mini())
-      return TabGtk::GetMiniWidth();
-
-    if (tab->IsActive()) {
-      return animation_.CurrentValueBetween(start_selected_width_,
-                                            end_selected_width_);
-    }
-
-    return animation_.CurrentValueBetween(start_unselected_width_,
-                                          end_unselected_width_);
-  }
-
- private:
-  // We need to start from the current widths of the Tabs as they were last
-  // laid out, _not_ the last known good state, which is what'll be done if we
-  // don't measure the Tab sizes here and just go with the default TabAnimation
-  // behavior...
-  void InitStartState() {
-    for (int i = 0; i < tabstrip_->GetTabCount(); ++i) {
-      TabGtk* current_tab = tabstrip_->GetTabAt(i);
-      if (!current_tab->mini()) {
-        if (current_tab->IsActive()) {
-          start_selected_width_ = current_tab->width();
-        } else {
-          start_unselected_width_ = current_tab->width();
-        }
-      }
-    }
-  }
-
-  DISALLOW_COPY_AND_ASSIGN(ResizeLayoutAnimation);
-};
-
-// Handles a tabs mini-state changing while the tab does not change position
-// in the model.
-class MiniTabAnimation : public TabStripGtk::TabAnimation {
- public:
-  MiniTabAnimation(TabStripGtk* tabstrip, int index)
-      : TabAnimation(tabstrip, MINI),
-        index_(index) {
-    int tab_count = tabstrip->GetTabCount();
-    int start_mini_count = tabstrip->GetMiniTabCount();
-    int end_mini_count = start_mini_count;
-    if (tabstrip->GetTabAt(index)->mini())
-      start_mini_count--;
-    else
-      start_mini_count++;
-    tabstrip_->GetTabAt(index)->set_animating_mini_change(true);
-    GenerateStartAndEndWidths(tab_count, tab_count, start_mini_count,
-                              end_mini_count);
-  }
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual int GetDuration() const OVERRIDE {
-    return kMiniTabAnimationDurationMs;
-  }
-
-  virtual double GetWidthForTab(int index) const OVERRIDE {
-    TabGtk* tab = tabstrip_->GetTabAt(index);
-
-    if (index == index_) {
-      if (tab->mini()) {
-        return animation_.CurrentValueBetween(
-            start_selected_width_,
-            static_cast<double>(TabGtk::GetMiniWidth()));
-      } else {
-        return animation_.CurrentValueBetween(
-            static_cast<double>(TabGtk::GetMiniWidth()),
-            end_selected_width_);
-      }
-    } else if (tab->mini()) {
-      return TabGtk::GetMiniWidth();
-    }
-
-    if (tab->IsActive()) {
-      return animation_.CurrentValueBetween(start_selected_width_,
-                                            end_selected_width_);
-    }
-
-    return animation_.CurrentValueBetween(start_unselected_width_,
-                                          end_unselected_width_);
-  }
-
- private:
-  // Index of the tab whose mini-state changed.
-  int index_;
-
-  DISALLOW_COPY_AND_ASSIGN(MiniTabAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-
-// Handles the animation when a tabs mini-state changes and the tab moves as a
-// result.
-class MiniMoveAnimation : public TabStripGtk::TabAnimation {
- public:
-  MiniMoveAnimation(TabStripGtk* tabstrip,
-                    int from_index,
-                    int to_index,
-                    const gfx::Rect& start_bounds)
-      : TabAnimation(tabstrip, MINI_MOVE),
-        tab_(tabstrip->GetTabAt(to_index)),
-        start_bounds_(start_bounds),
-        from_index_(from_index),
-        to_index_(to_index) {
-    int tab_count = tabstrip->GetTabCount();
-    int start_mini_count = tabstrip->GetMiniTabCount();
-    int end_mini_count = start_mini_count;
-    if (tabstrip->GetTabAt(to_index)->mini())
-      start_mini_count--;
-    else
-      start_mini_count++;
-    GenerateStartAndEndWidths(tab_count, tab_count, start_mini_count,
-                              end_mini_count);
-    target_bounds_ = tabstrip->GetIdealBounds(to_index);
-    tab_->set_animating_mini_change(true);
-  }
-
-  // Overridden from gfx::AnimationDelegate:
-  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE {
-    // Do the normal layout.
-    TabAnimation::AnimationProgressed(animation);
-
-    // Then special case the position of the tab being moved.
-    int x = animation_.CurrentValueBetween(start_bounds_.x(),
-                                           target_bounds_.x());
-    int width = animation_.CurrentValueBetween(start_bounds_.width(),
-                                               target_bounds_.width());
-    gfx::Rect tab_bounds(x, start_bounds_.y(), width,
-                         start_bounds_.height());
-    tabstrip_->SetTabBounds(tab_, tab_bounds);
-  }
-
-  virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE {
-    tabstrip_->needs_resize_layout_ = false;
-    TabStripGtk::TabAnimation::AnimationEnded(animation);
-  }
-
-  virtual double GetGapWidth(int index) OVERRIDE {
-    if (to_index_ < from_index_) {
-      // The tab was made mini.
-      if (index == to_index_) {
-        double current_size =
-            animation_.CurrentValueBetween(0, target_bounds_.width());
-        if (current_size < -kTabHOffset)
-          return -(current_size + kTabHOffset);
-      } else if (index == from_index_ + 1) {
-        return animation_.CurrentValueBetween(start_bounds_.width(), 0);
-      }
-    } else {
-      // The tab was was made a normal tab.
-      if (index == from_index_) {
-        return animation_.CurrentValueBetween(
-            TabGtk::GetMiniWidth() + kTabHOffset, 0);
-      }
-    }
-    return 0;
-  }
-
- protected:
-  // Overridden from TabStripGtk::TabAnimation:
-  virtual int GetDuration() const OVERRIDE {
-    return kReorderAnimationDurationMs;
-  }
-
-  virtual double GetWidthForTab(int index) const OVERRIDE {
-    TabGtk* tab = tabstrip_->GetTabAt(index);
-
-    if (index == to_index_)
-      return animation_.CurrentValueBetween(0, target_bounds_.width());
-
-    if (tab->mini())
-      return TabGtk::GetMiniWidth();
-
-    if (tab->IsActive()) {
-      return animation_.CurrentValueBetween(start_selected_width_,
-                                            end_selected_width_);
-    }
-
-    return animation_.CurrentValueBetween(start_unselected_width_,
-                                          end_unselected_width_);
-  }
-
- private:
-  // The tab being moved.
-  TabGtk* tab_;
-
-  // Initial bounds of tab_.
-  gfx::Rect start_bounds_;
-
-  // Target bounds.
-  gfx::Rect target_bounds_;
-
-  // Start and end indices of the tab.
-  int from_index_;
-  int to_index_;
-
-  DISALLOW_COPY_AND_ASSIGN(MiniMoveAnimation);
-};
-
-////////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, public:
-
-// static
-const int TabStripGtk::mini_to_non_mini_gap_ = 3;
-
-TabStripGtk::TabStripGtk(TabStripModel* model, BrowserWindowGtk* window)
-    : current_unselected_width_(TabGtk::GetStandardSize().width()),
-      current_selected_width_(TabGtk::GetStandardSize().width()),
-      available_width_for_tabs_(-1),
-      needs_resize_layout_(false),
-      tab_vertical_offset_(0),
-      model_(model),
-      window_(window),
-      theme_service_(GtkThemeService::GetFrom(model->profile())),
-      added_as_message_loop_observer_(false),
-      hover_tab_selector_(model),
-      weak_factory_(this),
-      layout_factory_(this) {
-}
-
-TabStripGtk::~TabStripGtk() {
-  model_->RemoveObserver(this);
-  tabstrip_.Destroy();
-
-  // Free any remaining tabs.  This is needed to free the very last tab,
-  // because it is not animated on close.  This also happens when all of the
-  // tabs are closed at once.
-  std::vector<TabData>::iterator iterator = tab_data_.begin();
-  for (; iterator < tab_data_.end(); iterator++) {
-    delete iterator->tab;
-  }
-
-  tab_data_.clear();
-
-  // Make sure we unhook ourselves as a message loop observer so that we don't
-  // crash in the case where the user closes the last tab in a window.
-  RemoveMessageLoopObserver();
-}
-
-void TabStripGtk::Init() {
-  model_->AddObserver(this);
-
-  tabstrip_.Own(gtk_fixed_new());
-  ViewIDUtil::SetID(tabstrip_.get(), VIEW_ID_TAB_STRIP);
-  // We want the tab strip to be horizontally shrinkable, so that the Chrome
-  // window can be resized freely.
-  gtk_widget_set_size_request(tabstrip_.get(), 0,
-                              TabGtk::GetMinimumUnselectedSize().height());
-  gtk_widget_set_app_paintable(tabstrip_.get(), TRUE);
-  gtk_drag_dest_set(tabstrip_.get(), GTK_DEST_DEFAULT_ALL,
-                    NULL, 0,
-                    static_cast<GdkDragAction>(
-                        GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK));
-  static const int targets[] = { ui::TEXT_URI_LIST,
-                                 ui::NETSCAPE_URL,
-                                 ui::TEXT_PLAIN,
-                                 -1 };
-  ui::SetDestTargetList(tabstrip_.get(), targets);
-
-  g_signal_connect(tabstrip_.get(), "map",
-                   G_CALLBACK(OnMapThunk), this);
-  g_signal_connect(tabstrip_.get(), "expose-event",
-                   G_CALLBACK(OnExposeThunk), this);
-  g_signal_connect(tabstrip_.get(), "size-allocate",
-                   G_CALLBACK(OnSizeAllocateThunk), this);
-  g_signal_connect(tabstrip_.get(), "drag-motion",
-                   G_CALLBACK(OnDragMotionThunk), this);
-  g_signal_connect(tabstrip_.get(), "drag-drop",
-                   G_CALLBACK(OnDragDropThunk), this);
-  g_signal_connect(tabstrip_.get(), "drag-leave",
-                   G_CALLBACK(OnDragLeaveThunk), this);
-  g_signal_connect(tabstrip_.get(), "drag-data-received",
-                   G_CALLBACK(OnDragDataReceivedThunk), this);
-
-  newtab_button_.reset(MakeNewTabButton());
-  newtab_surface_bounds_.SetRect(0, 0, newtab_button_->SurfaceWidth(),
-                                 newtab_button_->SurfaceHeight());
-
-  gtk_widget_show_all(tabstrip_.get());
-
-  bounds_ = GetInitialWidgetBounds(tabstrip_.get());
-
-  if (drop_indicator_width == 0) {
-    // Direction doesn't matter, both images are the same size.
-    GdkPixbuf* drop_image = GetDropArrowImage(true)->ToGdkPixbuf();
-    drop_indicator_width = gdk_pixbuf_get_width(drop_image);
-    drop_indicator_height = gdk_pixbuf_get_height(drop_image);
-  }
-
-  registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
-                 content::Source<ThemeService>(theme_service_));
-  theme_service_->InitThemesFor(this);
-
-  ViewIDUtil::SetDelegateForWidget(widget(), this);
-}
-
-void TabStripGtk::Show() {
-  gtk_widget_show(tabstrip_.get());
-}
-
-void TabStripGtk::Hide() {
-  gtk_widget_hide(tabstrip_.get());
-}
-
-bool TabStripGtk::IsActiveDropTarget() const {
-  for (int i = 0; i < GetTabCount(); ++i) {
-    TabGtk* tab = GetTabAt(i);
-    if (tab->dragging())
-      return true;
-  }
-  return false;
-}
-
-void TabStripGtk::Layout() {
-  // Called from:
-  // - window resize
-  // - animation completion
-  StopAnimation();
-
-  GenerateIdealBounds();
-  int tab_count = GetTabCount();
-  int tab_right = 0;
-  for (int i = 0; i < tab_count; ++i) {
-    const gfx::Rect& bounds = tab_data_.at(i).ideal_bounds;
-    TabGtk* tab = GetTabAt(i);
-    tab->set_animating_mini_change(false);
-    tab->set_vertical_offset(tab_vertical_offset_);
-    SetTabBounds(tab, bounds);
-    tab_right = bounds.right();
-    tab_right += GetTabHOffset(i + 1);
-  }
-
-  LayoutNewTabButton(static_cast<double>(tab_right), current_unselected_width_);
-}
-
-void TabStripGtk::SchedulePaint() {
-  gtk_widget_queue_draw(tabstrip_.get());
-}
-
-void TabStripGtk::SetBounds(const gfx::Rect& bounds) {
-  bounds_ = bounds;
-}
-
-void TabStripGtk::UpdateLoadingAnimations() {
-  for (int i = 0, index = 0; i < GetTabCount(); ++i, ++index) {
-    TabGtk* current_tab = GetTabAt(i);
-    if (current_tab->closing()) {
-      --index;
-    } else {
-      TabRendererGtk::AnimationState state;
-      content::WebContents* web_contents = model_->GetWebContentsAt(index);
-      if (!web_contents|| !web_contents->IsLoading()) {
-        state = TabGtk::ANIMATION_NONE;
-      } else if (web_contents->IsWaitingForResponse()) {
-        state = TabGtk::ANIMATION_WAITING;
-      } else {
-        state = TabGtk::ANIMATION_LOADING;
-      }
-      if (current_tab->ValidateLoadingAnimation(state)) {
-        // Queue the tab's icon area to be repainted.
-        gfx::Rect favicon_bounds = current_tab->favicon_bounds();
-        gtk_widget_queue_draw_area(tabstrip_.get(),
-            favicon_bounds.x() + current_tab->x(),
-            favicon_bounds.y() + current_tab->y(),
-            favicon_bounds.width(),
-            favicon_bounds.height());
-      }
-    }
-  }
-}
-
-bool TabStripGtk::IsCompatibleWith(TabStripGtk* other) {
-  return model_->profile() == other->model()->profile();
-}
-
-bool TabStripGtk::IsAnimating() const {
-  return active_animation_.get() != NULL;
-}
-
-void TabStripGtk::DestroyDragController() {
-  drag_controller_.reset();
-}
-
-void TabStripGtk::DestroyDraggedTab(TabGtk* tab) {
-  // We could be running an animation that references this Tab.
-  StopAnimation();
-
-  // Make sure we leave the tab_data_ vector in a consistent state, otherwise
-  // we'll be pointing to tabs that have been deleted and removed from the
-  // child view list.
-  std::vector<TabData>::iterator it = tab_data_.begin();
-  for (; it != tab_data_.end(); ++it) {
-    if (it->tab == tab) {
-      if (!model_->closing_all())
-        NOTREACHED() << "Leaving in an inconsistent state!";
-      tab_data_.erase(it);
-      break;
-    }
-  }
-
-  gtk_container_remove(GTK_CONTAINER(tabstrip_.get()), tab->widget());
-  // If we delete the dragged source tab here, the DestroyDragWidget posted
-  // task will be run after the tab is deleted, leading to a crash.
-  base::MessageLoop::current()->DeleteSoon(FROM_HERE, tab);
-
-  // Force a layout here, because if we've just quickly drag detached a Tab,
-  // the stopping of the active animation above may have left the TabStrip in a
-  // bad (visual) state.
-  Layout();
-}
-
-gfx::Rect TabStripGtk::GetIdealBounds(int index) {
-  DCHECK(index >= 0 && index < GetTabCount());
-  return tab_data_.at(index).ideal_bounds;
-}
-
-void TabStripGtk::SetVerticalOffset(int offset) {
-  tab_vertical_offset_ = offset;
-  Layout();
-}
-
-gfx::Point TabStripGtk::GetTabStripOriginForWidget(GtkWidget* target) {
-  int x, y;
-  GtkAllocation widget_allocation;
-  gtk_widget_get_allocation(widget(), &widget_allocation);
-  if (!gtk_widget_translate_coordinates(widget(), target,
-      -widget_allocation.x, 0, &x, &y)) {
-    // If the tab strip isn't showing, give the coordinates relative to the
-    // toplevel instead.
-    if (!gtk_widget_translate_coordinates(
-        gtk_widget_get_toplevel(widget()), target, 0, 0, &x, &y)) {
-      NOTREACHED();
-    }
-  }
-  if (!gtk_widget_get_has_window(target)) {
-    GtkAllocation target_allocation;
-    gtk_widget_get_allocation(target, &target_allocation);
-    x += target_allocation.x;
-    y += target_allocation.y;
-  }
-  return gfx::Point(x, y);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// ViewIDUtil::Delegate implementation
-
-GtkWidget* TabStripGtk::GetWidgetForViewID(ViewID view_id) {
-  if (GetTabCount() > 0) {
-    if (view_id == VIEW_ID_TAB_LAST) {
-      return GetTabAt(GetTabCount() - 1)->widget();
-    } else if ((view_id >= VIEW_ID_TAB_0) && (view_id < VIEW_ID_TAB_LAST)) {
-      int index = view_id - VIEW_ID_TAB_0;
-      if (index >= 0 && index < GetTabCount()) {
-        return GetTabAt(index)->widget();
-      } else {
-        return NULL;
-      }
-    }
-  }
-
-  return NULL;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, TabStripModelObserver implementation:
-
-void TabStripGtk::TabInsertedAt(WebContents* contents,
-                                int index,
-                                bool foreground) {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::TabInsertedAt");
-
-  DCHECK(contents);
-  DCHECK(index == TabStripModel::kNoTab || model_->ContainsIndex(index));
-
-  StopAnimation();
-
-  bool contains_tab = false;
-  TabGtk* tab = NULL;
-  // First see if this Tab is one that was dragged out of this TabStrip and is
-  // now being dragged back in. In this case, the DraggedTabController actually
-  // has the Tab already constructed and we can just insert it into our list
-  // again.
-  if (IsDragSessionActive()) {
-    tab = drag_controller_->GetDraggedTabForContents(contents);
-    if (tab) {
-      // If the Tab was detached, it would have been animated closed but not
-      // removed, so we need to reset this property.
-      tab->set_closing(false);
-      tab->ValidateLoadingAnimation(TabRendererGtk::ANIMATION_NONE);
-      tab->SetVisible(true);
-    }
-
-    // See if we're already in the list. We don't want to add ourselves twice.
-    std::vector<TabData>::const_iterator iter = tab_data_.begin();
-    for (; iter != tab_data_.end() && !contains_tab; ++iter) {
-      if (iter->tab == tab)
-        contains_tab = true;
-    }
-  }
-
-  if (!tab)
-    tab = new TabGtk(this);
-
-  // Only insert if we're not already in the list.
-  if (!contains_tab) {
-    TabData d = { tab, gfx::Rect() };
-    tab_data_.insert(tab_data_.begin() + index, d);
-    tab->UpdateData(contents, model_->IsAppTab(index), false);
-  }
-  tab->set_mini(model_->IsMiniTab(index));
-  tab->set_app(model_->IsAppTab(index));
-  tab->SetBlocked(model_->IsTabBlocked(index));
-
-  if (gtk_widget_get_parent(tab->widget()) != tabstrip_.get())
-    gtk_fixed_put(GTK_FIXED(tabstrip_.get()), tab->widget(), 0, 0);
-
-  // Don't animate the first tab; it looks weird.
-  if (GetTabCount() > 1) {
-    StartInsertTabAnimation(index);
-    // We added the tab at 0x0, we need to force an animation step otherwise
-    // if GTK paints before the animation event the tab is painted at 0x0
-    // which is most likely not where it should be positioned.
-    active_animation_->AnimationProgressed(NULL);
-  } else {
-    Layout();
-  }
-
-  ReStack();
-}
-
-void TabStripGtk::TabDetachedAt(WebContents* contents, int index) {
-  GenerateIdealBounds();
-  StartRemoveTabAnimation(index, contents);
-  // Have to do this _after_ calling StartRemoveTabAnimation, so that any
-  // previous remove is completed fully and index is valid in sync with the
-  // model index.
-  GetTabAt(index)->set_closing(true);
-}
-
-void TabStripGtk::ActiveTabChanged(WebContents* old_contents,
-                                   WebContents* new_contents,
-                                   int index,
-                                   int reason) {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::ActiveTabChanged");
-  ReStack();
-}
-
-void TabStripGtk::TabSelectionChanged(TabStripModel* tab_strip_model,
-                                      const ui::ListSelectionModel& old_model) {
-  // We have "tiny tabs" if the tabs are so tiny that the unselected ones are
-  // a different size to the selected ones.
-  bool tiny_tabs = current_unselected_width_ != current_selected_width_;
-  if (!IsAnimating() && (!needs_resize_layout_ || tiny_tabs))
-    Layout();
-
-  if (model_->active_index() >= 0)
-    GetTabAt(model_->active_index())->SchedulePaint();
-
-  if (old_model.active() >= 0) {
-    GetTabAt(old_model.active())->SchedulePaint();
-    GetTabAt(old_model.active())->StopMiniTabTitleAnimation();
-  }
-
-  std::vector<int> indices_affected;
-  std::insert_iterator<std::vector<int> > it1(indices_affected,
-                                              indices_affected.begin());
-  std::set_symmetric_difference(
-      old_model.selected_indices().begin(),
-      old_model.selected_indices().end(),
-      model_->selection_model().selected_indices().begin(),
-      model_->selection_model().selected_indices().end(),
-      it1);
-  for (std::vector<int>::iterator it = indices_affected.begin();
-       it != indices_affected.end(); ++it) {
-    // SchedulePaint() has already been called for the active tab and
-    // the previously active tab (if it still exists).
-    if (*it != model_->active_index() && *it != old_model.active())
-      GetTabAtAdjustForAnimation(*it)->SchedulePaint();
-  }
-
-  ui::ListSelectionModel::SelectedIndices no_longer_selected =
-      base::STLSetDifference<ui::ListSelectionModel::SelectedIndices>(
-          old_model.selected_indices(),
-          model_->selection_model().selected_indices());
-  for (std::vector<int>::iterator it = no_longer_selected.begin();
-       it != no_longer_selected.end(); ++it) {
-    GetTabAtAdjustForAnimation(*it)->StopMiniTabTitleAnimation();
-  }
-}
-
-void TabStripGtk::TabMoved(WebContents* contents,
-                           int from_index,
-                           int to_index) {
-  gfx::Rect start_bounds = GetIdealBounds(from_index);
-  TabGtk* tab = GetTabAt(from_index);
-  tab_data_.erase(tab_data_.begin() + from_index);
-  TabData data = {tab, gfx::Rect()};
-  tab->set_mini(model_->IsMiniTab(to_index));
-  tab->SetBlocked(model_->IsTabBlocked(to_index));
-  tab_data_.insert(tab_data_.begin() + to_index, data);
-  GenerateIdealBounds();
-  StartMoveTabAnimation(from_index, to_index);
-  ReStack();
-}
-
-void TabStripGtk::TabChangedAt(WebContents* contents,
-                               int index,
-                               TabChangeType change_type) {
-  // Index is in terms of the model. Need to make sure we adjust that index in
-  // case we have an animation going.
-  TabGtk* tab = GetTabAtAdjustForAnimation(index);
-  if (change_type == TITLE_NOT_LOADING) {
-    if (tab->mini() && !tab->IsActive())
-      tab->StartMiniTabTitleAnimation();
-    // We'll receive another notification of the change asynchronously.
-    return;
-  }
-  tab->UpdateData(contents,
-                  model_->IsAppTab(index),
-                  change_type == LOADING_ONLY);
-  tab->UpdateFromModel();
-}
-
-void TabStripGtk::TabReplacedAt(TabStripModel* tab_strip_model,
-                                WebContents* old_contents,
-                                WebContents* new_contents,
-                                int index) {
-  TabChangedAt(new_contents, index, ALL);
-}
-
-void TabStripGtk::TabMiniStateChanged(WebContents* contents, int index) {
-  // Don't do anything if we've already picked up the change from TabMoved.
-  if (GetTabAt(index)->mini() == model_->IsMiniTab(index))
-    return;
-
-  GetTabAt(index)->set_mini(model_->IsMiniTab(index));
-  // Don't animate if the window isn't visible yet. The window won't be visible
-  // when dragging a mini-tab to a new window.
-  if (window_ && window_->window() &&
-      gtk_widget_get_visible(GTK_WIDGET(window_->window()))) {
-    StartMiniTabAnimation(index);
-  } else {
-    Layout();
-  }
-}
-
-void TabStripGtk::TabBlockedStateChanged(WebContents* contents, int index) {
-  GetTabAt(index)->SetBlocked(model_->IsTabBlocked(index));
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, TabGtk::TabDelegate implementation:
-
-bool TabStripGtk::IsTabActive(const TabGtk* tab) const {
-  if (tab->closing())
-    return false;
-
-  return GetIndexOfTab(tab) == model_->active_index();
-}
-
-bool TabStripGtk::IsTabSelected(const TabGtk* tab) const {
-  if (tab->closing())
-    return false;
-
-  return model_->IsTabSelected(GetIndexOfTab(tab));
-}
-
-bool TabStripGtk::IsTabDetached(const TabGtk* tab) const {
-  if (drag_controller_.get())
-    return drag_controller_->IsTabDetached(tab);
-  return false;
-}
-
-void TabStripGtk::GetCurrentTabWidths(double* unselected_width,
-                                      double* selected_width) const {
-  *unselected_width = current_unselected_width_;
-  *selected_width = current_selected_width_;
-}
-
-bool TabStripGtk::IsTabPinned(const TabGtk* tab) const {
-  if (tab->closing())
-    return false;
-
-  return model_->IsTabPinned(GetIndexOfTab(tab));
-}
-
-void TabStripGtk::ActivateTab(TabGtk* tab) {
-  int index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(index))
-    model_->ActivateTabAt(index, true);
-}
-
-void TabStripGtk::ToggleTabSelection(TabGtk* tab) {
-  int index = GetIndexOfTab(tab);
-  model_->ToggleSelectionAt(index);
-}
-
-void TabStripGtk::ExtendTabSelection(TabGtk* tab) {
-  int index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(index))
-    model_->ExtendSelectionTo(index);
-}
-
-void TabStripGtk::CloseTab(TabGtk* tab) {
-  int tab_index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(tab_index)) {
-    TabGtk* last_tab = GetTabAt(GetTabCount() - 1);
-    // Limit the width available to the TabStrip for laying out Tabs, so that
-    // Tabs are not resized until a later time (when the mouse pointer leaves
-    // the TabStrip).
-    available_width_for_tabs_ = GetAvailableWidthForTabs(last_tab);
-    needs_resize_layout_ = true;
-    // We hook into the message loop in order to receive mouse move events when
-    // the mouse is outside of the tabstrip.  We unhook once the resize layout
-    // animation is started.
-    AddMessageLoopObserver();
-    model_->CloseWebContentsAt(tab_index,
-                               TabStripModel::CLOSE_USER_GESTURE |
-                               TabStripModel::CLOSE_CREATE_HISTORICAL_TAB);
-  }
-}
-
-bool TabStripGtk::IsCommandEnabledForTab(
-    TabStripModel::ContextMenuCommand command_id, const TabGtk* tab) const {
-  int index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(index))
-    return model_->IsContextMenuCommandEnabled(index, command_id);
-  return false;
-}
-
-void TabStripGtk::ExecuteCommandForTab(
-    TabStripModel::ContextMenuCommand command_id, TabGtk* tab) {
-  int index = GetIndexOfTab(tab);
-  if (model_->ContainsIndex(index))
-    model_->ExecuteContextMenuCommand(index, command_id);
-}
-
-void TabStripGtk::StartHighlightTabsForCommand(
-    TabStripModel::ContextMenuCommand command_id, TabGtk* tab) {
-  if (command_id == TabStripModel::CommandCloseOtherTabs ||
-      command_id == TabStripModel::CommandCloseTabsToRight) {
-    NOTIMPLEMENTED();
-  }
-}
-
-void TabStripGtk::StopHighlightTabsForCommand(
-    TabStripModel::ContextMenuCommand command_id, TabGtk* tab) {
-  if (command_id == TabStripModel::CommandCloseTabsToRight ||
-      command_id == TabStripModel::CommandCloseOtherTabs) {
-    // Just tell all Tabs to stop pulsing - it's safe.
-    StopAllHighlighting();
-  }
-}
-
-void TabStripGtk::StopAllHighlighting() {
-  // TODO(jhawkins): Hook up animations.
-  NOTIMPLEMENTED();
-}
-
-void TabStripGtk::MaybeStartDrag(TabGtk* tab, const gfx::Point& point) {
-  // Don't accidentally start any drag operations during animations if the
-  // mouse is down.
-  if (IsAnimating() || tab->closing() || !HasAvailableDragActions())
-    return;
-
-  std::vector<TabGtk*> tabs;
-  for (size_t i = 0; i < model()->selection_model().size(); i++) {
-    TabGtk* selected_tab =
-        GetTabAtAdjustForAnimation(
-            model()->selection_model().selected_indices()[i]);
-    if (!selected_tab->closing())
-      tabs.push_back(selected_tab);
-  }
-
-  drag_controller_.reset(new DraggedTabControllerGtk(this, tab, tabs));
-  drag_controller_->CaptureDragInfo(point);
-}
-
-void TabStripGtk::ContinueDrag(GdkDragContext* context) {
-  // We can get called even if |MaybeStartDrag| wasn't called in the event of
-  // a TabStrip animation when the mouse button is down. In this case we should
-  // _not_ continue the drag because it can lead to weird bugs.
-  if (drag_controller_.get())
-    drag_controller_->Drag();
-}
-
-bool TabStripGtk::EndDrag(bool canceled) {
-  return drag_controller_.get() ? drag_controller_->EndDrag(canceled) : false;
-}
-
-bool TabStripGtk::HasAvailableDragActions() const {
-  return model_->delegate()->GetDragActions() != 0;
-}
-
-GtkThemeService* TabStripGtk::GetThemeProvider() {
-  return theme_service_;
-}
-
-TabStripMenuController* TabStripGtk::GetTabStripMenuControllerForTab(
-    TabGtk* tab) {
-  return new TabStripMenuController(tab, model(), GetIndexOfTab(tab));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, MessageLoop::Observer implementation:
-
-void TabStripGtk::WillProcessEvent(GdkEvent* event) {
-  // Nothing to do.
-}
-
-void TabStripGtk::DidProcessEvent(GdkEvent* event) {
-  switch (event->type) {
-    case GDK_MOTION_NOTIFY:
-    case GDK_LEAVE_NOTIFY:
-      HandleGlobalMouseMoveEvent();
-      break;
-    default:
-      break;
-  }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, content::NotificationObserver implementation:
-
-void TabStripGtk::Observe(int type,
-                          const content::NotificationSource& source,
-                          const content::NotificationDetails& details) {
-  DCHECK_EQ(type, chrome::NOTIFICATION_BROWSER_THEME_CHANGED);
-  SetNewTabButtonBackground();
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// TabStripGtk, private:
-
-int TabStripGtk::GetTabCount() const {
-  return static_cast<int>(tab_data_.size());
-}
-
-int TabStripGtk::GetMiniTabCount() const {
-  int mini_count = 0;
-  for (size_t i = 0; i < tab_data_.size(); ++i) {
-    if (tab_data_[i].tab->mini())
-      mini_count++;
-    else
-      return mini_count;
-  }
-  return mini_count;
-}
-
-int TabStripGtk::GetAvailableWidthForTabs(TabGtk* last_tab) const {
-  if (!base::i18n::IsRTL())
-    return last_tab->x() - bounds_.x() + last_tab->width();
-  else
-    return bounds_.width() - last_tab->x();
-}
-
-int TabStripGtk::GetIndexOfTab(const TabGtk* tab) const {
-  for (int i = 0, index = 0; i < GetTabCount(); ++i, ++index) {
-    TabGtk* current_tab = GetTabAt(i);
-    if (current_tab->closing()) {
-      --index;
-    } else if (current_tab == tab) {
-      return index;
-    }
-  }
-  return -1;
-}
-
-TabGtk* TabStripGtk::GetTabAt(int index) const {
-  DCHECK_GE(index, 0);
-  DCHECK_LT(index, GetTabCount());
-  return tab_data_.at(index).tab;
-}
-
-TabGtk* TabStripGtk::GetTabAtAdjustForAnimation(int index) const {
-  if (active_animation_.get() &&
-      active_animation_->type() == TabAnimation::REMOVE &&
-      index >=
-      static_cast<RemoveTabAnimation*>(active_animation_.get())->index()) {
-    index++;
-  }
-  return GetTabAt(index);
-}
-
-void TabStripGtk::RemoveTabAt(int index) {
-  TabGtk* removed = tab_data_.at(index).tab;
-
-  // Remove the Tab from the TabStrip's list.
-  tab_data_.erase(tab_data_.begin() + index);
-
-  if (!removed->dragging()) {
-    gtk_container_remove(GTK_CONTAINER(tabstrip_.get()), removed->widget());
-    delete removed;
-  }
-}
-
-void TabStripGtk::HandleGlobalMouseMoveEvent() {
-  if (!IsCursorInTabStripZone()) {
-    // Mouse moved outside the tab slop zone, start a timer to do a resize
-    // layout after a short while...
-    if (!weak_factory_.HasWeakPtrs()) {
-      base::MessageLoop::current()->PostDelayedTask(
-          FROM_HERE,
-          base::Bind(&TabStripGtk::ResizeLayoutTabs,
-                     weak_factory_.GetWeakPtr()),
-          base::TimeDelta::FromMilliseconds(kResizeTabsTimeMs));
-    }
-  } else {
-    // Mouse moved quickly out of the tab strip and then into it again, so
-    // cancel the timer so that the strip doesn't move when the mouse moves
-    // back over it.
-    weak_factory_.InvalidateWeakPtrs();
-  }
-}
-
-void TabStripGtk::GenerateIdealBounds() {
-  int tab_count = GetTabCount();
-  double unselected, selected;
-  GetDesiredTabWidths(tab_count, GetMiniTabCount(), &unselected, &selected);
-
-  current_unselected_width_ = unselected;
-  current_selected_width_ = selected;
-
-  // NOTE: This currently assumes a tab's height doesn't differ based on
-  // selected state or the number of tabs in the strip!
-  int tab_height = TabGtk::GetStandardSize().height();
-  double tab_x = tab_start_x();
-  for (int i = 0; i < tab_count; ++i) {
-    TabGtk* tab = GetTabAt(i);
-    double tab_width = unselected;
-    if (tab->mini())
-      tab_width = TabGtk::GetMiniWidth();
-    else if (tab->IsActive())
-      tab_width = selected;
-    double end_of_tab = tab_x + tab_width;
-    int rounded_tab_x = Round(tab_x);
-    gfx::Rect state(rounded_tab_x, 0, Round(end_of_tab) - rounded_tab_x,
-                    tab_height);
-    tab_data_.at(i).ideal_bounds = state;
-    tab_x = end_of_tab + GetTabHOffset(i + 1);
-  }
-}
-
-void TabStripGtk::LayoutNewTabButton(double last_tab_right,
-                                     double unselected_width) {
-  GtkWidget* toplevel = gtk_widget_get_ancestor(widget(), GTK_TYPE_WINDOW);
-  bool is_maximized = false;
-  if (toplevel) {
-    GdkWindow* gdk_window = gtk_widget_get_window(toplevel);
-    is_maximized = (gdk_window_get_state(gdk_window) &
-                    GDK_WINDOW_STATE_MAXIMIZED) != 0;
-  }
-
-  int y = is_maximized ? 0 : kNewTabButtonVOffset;
-  int height = newtab_surface_bounds_.height() + kNewTabButtonVOffset - y;
-
-  gfx::Rect bounds(0, y, newtab_surface_bounds_.width(), height);
-  int delta = abs(Round(unselected_width) - TabGtk::GetStandardSize().width());
-  if (delta > 1 && !needs_resize_layout_) {
-    // We're shrinking tabs, so we need to anchor the New Tab button to the
-    // right edge of the TabStrip's bounds, rather than the right edge of the
-    // right-most Tab, otherwise it'll bounce when animating.
-    bounds.set_x(bounds_.width() - newtab_button_->WidgetAllocation().width);
-  } else {
-    bounds.set_x(Round(last_tab_right - kTabHOffset) + kNewTabButtonHOffset);
-  }
-  bounds.set_x(gtk_util::MirroredLeftPointForRect(tabstrip_.get(), bounds));
-
-  gtk_fixed_move(GTK_FIXED(tabstrip_.get()), newtab_button_->widget(),
-                 bounds.x(), bounds.y());
-  gtk_widget_set_size_request(newtab_button_->widget(), bounds.width(),
-                              bounds.height());
-}
-
-void TabStripGtk::GetDesiredTabWidths(int tab_count,
-                                      int mini_tab_count,
-                                      double* unselected_width,
-                                      double* selected_width) const {
-  DCHECK(tab_count >= 0 && mini_tab_count >= 0 && mini_tab_count <= tab_count);
-  const double min_unselected_width =
-      TabGtk::GetMinimumUnselectedSize().width();
-  const double min_selected_width =
-      TabGtk::GetMinimumSelectedSize().width();
-
-  *unselected_width = min_unselected_width;
-  *selected_width = min_selected_width;
-
-  if (tab_count == 0) {
-    // Return immediately to avoid divide-by-zero below.
-    return;
-  }
-
-  // Determine how much space we can actually allocate to tabs.
-  GtkAllocation tabstrip_allocation;
-  gtk_widget_get_allocation(tabstrip_.get(), &tabstrip_allocation);
-  int available_width = tabstrip_allocation.width;
-  if (available_width_for_tabs_ < 0) {
-    available_width = bounds_.width();
-    available_width -=
-        (kNewTabButtonHOffset + newtab_button_->WidgetAllocation().width);
-  } else {
-    // Interesting corner case: if |available_width_for_tabs_| > the result
-    // of the calculation in the conditional arm above, the strip is in
-    // overflow.  We can either use the specified width or the true available
-    // width here; the first preserves the consistent "leave the last tab under
-    // the user's mouse so they can close many tabs" behavior at the cost of
-    // prolonging the glitchy appearance of the overflow state, while the second
-    // gets us out of overflow as soon as possible but forces the user to move
-    // their mouse for a few tabs' worth of closing.  We choose visual
-    // imperfection over behavioral imperfection and select the first option.
-    available_width = available_width_for_tabs_;
-  }
-
-  if (mini_tab_count > 0) {
-    available_width -= mini_tab_count * (TabGtk::GetMiniWidth() + kTabHOffset);
-    tab_count -= mini_tab_count;
-    if (tab_count == 0) {
-      *selected_width = *unselected_width = TabGtk::GetStandardSize().width();
-      return;
-    }
-    // Account for gap between the last mini-tab and first normal tab.
-    available_width -= mini_to_non_mini_gap_;
-  }
-
-  // Calculate the desired tab widths by dividing the available space into equal
-  // portions.  Don't let tabs get larger than the "standard width" or smaller
-  // than the minimum width for each type, respectively.
-  const int total_offset = kTabHOffset * (tab_count - 1);
-  const double desired_tab_width = std::min(
-      (static_cast<double>(available_width - total_offset) /
-       static_cast<double>(tab_count)),
-      static_cast<double>(TabGtk::GetStandardSize().width()));
-
-  *unselected_width = std::max(desired_tab_width, min_unselected_width);
-  *selected_width = std::max(desired_tab_width, min_selected_width);
-
-  // When there are multiple tabs, we'll have one selected and some unselected
-  // tabs.  If the desired width was between the minimum sizes of these types,
-  // try to shrink the tabs with the smaller minimum.  For example, if we have
-  // a strip of width 10 with 4 tabs, the desired width per tab will be 2.5.  If
-  // selected tabs have a minimum width of 4 and unselected tabs have a minimum
-  // width of 1, the above code would set *unselected_width = 2.5,
-  // *selected_width = 4, which results in a total width of 11.5.  Instead, we
-  // want to set *unselected_width = 2, *selected_width = 4, for a total width
-  // of 10.
-  if (tab_count > 1) {
-    if ((min_unselected_width < min_selected_width) &&
-        (desired_tab_width < min_selected_width)) {
-      double calc_width =
-          static_cast<double>(
-              available_width - total_offset - min_selected_width) /
-          static_cast<double>(tab_count - 1);
-      *unselected_width = std::max(calc_width, min_unselected_width);
-    } else if ((min_unselected_width > min_selected_width) &&
-               (desired_tab_width < min_unselected_width)) {
-      *selected_width = std::max(available_width - total_offset -
-          (min_unselected_width * (tab_count - 1)), min_selected_width);
-    }
-  }
-}
-
-int TabStripGtk::GetTabHOffset(int tab_index) {
-  if (tab_index < GetTabCount() && GetTabAt(tab_index - 1)->mini() &&
-      !GetTabAt(tab_index)->mini()) {
-    return mini_to_non_mini_gap_ + kTabHOffset;
-  }
-  return kTabHOffset;
-}
-
-int TabStripGtk::tab_start_x() const {
-  return 0;
-}
-
-void TabStripGtk::ResizeLayoutTabs() {
-  weak_factory_.InvalidateWeakPtrs();
-  layout_factory_.InvalidateWeakPtrs();
-
-  // It is critically important that this is unhooked here, otherwise we will
-  // keep spying on messages forever.
-  RemoveMessageLoopObserver();
-
-  available_width_for_tabs_ = -1;
-  int mini_tab_count = GetMiniTabCount();
-  if (mini_tab_count == GetTabCount()) {
-    // Only mini tabs, we know the tab widths won't have changed (all mini-tabs
-    // have the same width), so there is nothing to do.
-    return;
-  }
-  TabGtk* first_tab = GetTabAt(mini_tab_count);
-  double unselected, selected;
-  GetDesiredTabWidths(GetTabCount(), mini_tab_count, &unselected, &selected);
-  int w = Round(first_tab->IsActive() ? selected : unselected);
-
-  // We only want to run the animation if we're not already at the desired
-  // size.
-  if (abs(first_tab->width() - w) > 1)
-    StartResizeLayoutAnimation();
-}
-
-bool TabStripGtk::IsCursorInTabStripZone() const {
-  gfx::Point tabstrip_topleft;
-  gtk_util::ConvertWidgetPointToScreen(tabstrip_.get(), &tabstrip_topleft);
-
-  gfx::Rect bds = bounds();
-  bds.set_origin(tabstrip_topleft);
-  bds.set_height(bds.height() + kTabStripAnimationVSlop);
-
-  GdkScreen* screen = gdk_screen_get_default();
-  GdkDisplay* display = gdk_screen_get_display(screen);
-  gint x, y;
-  gdk_display_get_pointer(display, NULL, &x, &y, NULL);
-  gfx::Point cursor_point(x, y);
-
-  return bds.Contains(cursor_point);
-}
-
-void TabStripGtk::ReStack() {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::ReStack");
-
-  if (!gtk_widget_get_realized(tabstrip_.get())) {
-    // If the window isn't realized yet, we can't stack them yet. It will be
-    // done by the OnMap signal handler.
-    return;
-  }
-  int tab_count = GetTabCount();
-  TabGtk* active_tab = NULL;
-  for (int i = tab_count - 1; i >= 0; --i) {
-    TabGtk* tab = GetTabAt(i);
-    if (tab->IsActive())
-      active_tab = tab;
-    else
-      tab->Raise();
-  }
-  if (active_tab)
-    active_tab->Raise();
-}
-
-void TabStripGtk::AddMessageLoopObserver() {
-  if (!added_as_message_loop_observer_) {
-    base::MessageLoopForUI::current()->AddObserver(this);
-    added_as_message_loop_observer_ = true;
-  }
-}
-
-void TabStripGtk::RemoveMessageLoopObserver() {
-  if (added_as_message_loop_observer_) {
-    base::MessageLoopForUI::current()->RemoveObserver(this);
-    added_as_message_loop_observer_ = false;
-  }
-}
-
-gfx::Rect TabStripGtk::GetDropBounds(int drop_index,
-                                     bool drop_before,
-                                     bool* is_beneath) {
-  DCHECK_NE(drop_index, -1);
-  int center_x;
-  if (drop_index < GetTabCount()) {
-    TabGtk* tab = GetTabAt(drop_index);
-    gfx::Rect bounds = tab->GetNonMirroredBounds(tabstrip_.get());
-    // TODO(sky): update these for pinned tabs.
-    if (drop_before)
-      center_x = bounds.x() - (kTabHOffset / 2);
-    else
-      center_x = bounds.x() + (bounds.width() / 2);
-  } else {
-    TabGtk* last_tab = GetTabAt(drop_index - 1);
-    gfx::Rect bounds = last_tab->GetNonMirroredBounds(tabstrip_.get());
-    center_x = bounds.x() + bounds.width() + (kTabHOffset / 2);
-  }
-
-  center_x = gtk_util::MirroredXCoordinate(tabstrip_.get(), center_x);
-
-  // Determine the screen bounds.
-  gfx::Point drop_loc(center_x - drop_indicator_width / 2,
-                      -drop_indicator_height);
-  gtk_util::ConvertWidgetPointToScreen(tabstrip_.get(), &drop_loc);
-  gfx::Rect drop_bounds(drop_loc.x(), drop_loc.y(), drop_indicator_width,
-                        drop_indicator_height);
-
-  // TODO(jhawkins): We always display the arrow underneath the tab because we
-  // don't have custom frame support yet.
-  *is_beneath = true;
-  if (*is_beneath)
-    drop_bounds.Offset(0, drop_bounds.height() + bounds().height());
-
-  return drop_bounds;
-}
-
-void TabStripGtk::UpdateDropIndex(GdkDragContext* context, gint x, gint y) {
-  // If the UI layout is right-to-left, we need to mirror the mouse
-  // coordinates since we calculate the drop index based on the
-  // original (and therefore non-mirrored) positions of the tabs.
-  x = gtk_util::MirroredXCoordinate(tabstrip_.get(), x);
-  // We don't allow replacing the urls of mini-tabs.
-  for (int i = GetMiniTabCount(); i < GetTabCount(); ++i) {
-    TabGtk* tab = GetTabAt(i);
-    gfx::Rect bounds = tab->GetNonMirroredBounds(tabstrip_.get());
-    const int tab_max_x = bounds.x() + bounds.width();
-    const int hot_width = bounds.width() / kTabEdgeRatioInverse;
-    if (x < tab_max_x) {
-      if (x < bounds.x() + hot_width)
-        SetDropIndex(i, true);
-      else if (x >= tab_max_x - hot_width)
-        SetDropIndex(i + 1, true);
-      else
-        SetDropIndex(i, false);
-      return;
-    }
-  }
-
-  // The drop isn't over a tab, add it to the end.
-  SetDropIndex(GetTabCount(), true);
-}
-
-void TabStripGtk::SetDropIndex(int index, bool drop_before) {
-  bool is_beneath;
-  gfx::Rect drop_bounds = GetDropBounds(index, drop_before, &is_beneath);
-
-  // Perform a delayed tab transition if hovering directly over a tab;
-  // otherwise, cancel the pending one.
-  if (index != -1 && !drop_before)
-    hover_tab_selector_.StartTabTransition(index);
-  else
-    hover_tab_selector_.CancelTabTransition();
-
-  if (!drop_info_.get()) {
-    drop_info_.reset(new DropInfo(index, drop_before, !is_beneath));
-  } else {
-    if (!GTK_IS_WIDGET(drop_info_->container)) {
-      drop_info_->CreateContainer();
-    } else if (drop_info_->drop_index == index &&
-               drop_info_->drop_before == drop_before) {
-      return;
-    }
-
-    drop_info_->drop_index = index;
-    drop_info_->drop_before = drop_before;
-    if (is_beneath == drop_info_->point_down) {
-      drop_info_->point_down = !is_beneath;
-      drop_info_->drop_arrow = GetDropArrowImage(drop_info_->point_down);
-    }
-  }
-
-  gtk_window_move(GTK_WINDOW(drop_info_->container),
-                  drop_bounds.x(), drop_bounds.y());
-  gtk_window_resize(GTK_WINDOW(drop_info_->container),
-                    drop_bounds.width(), drop_bounds.height());
-}
-
-bool TabStripGtk::CompleteDrop(const guchar* data, bool is_plain_text) {
-  if (!drop_info_.get())
-    return false;
-
-  const int drop_index = drop_info_->drop_index;
-  const bool drop_before = drop_info_->drop_before;
-
-  // Destroy the drop indicator.
-  drop_info_.reset();
-
-  // Cancel any pending tab transition.
-  hover_tab_selector_.CancelTabTransition();
-
-  GURL url;
-  if (is_plain_text) {
-    AutocompleteMatch match;
-    AutocompleteClassifierFactory::GetForProfile(model_->profile())->Classify(
-        base::UTF8ToUTF16(reinterpret_cast<const char*>(data)),
-        false, false, AutocompleteInput::INVALID_SPEC, &match, NULL);
-    url = match.destination_url;
-  } else {
-    std::string url_string(reinterpret_cast<const char*>(data));
-    url = GURL(url_string.substr(0, url_string.find_first_of('\n')));
-  }
-  if (!url.is_valid())
-    return false;
-
-  chrome::NavigateParams params(window()->browser(), url,
-                                content::PAGE_TRANSITION_LINK);
-  params.tabstrip_index = drop_index;
-
-  if (drop_before) {
-    params.disposition = NEW_FOREGROUND_TAB;
-  } else {
-    params.disposition = CURRENT_TAB;
-    params.source_contents = model_->GetWebContentsAt(drop_index);
-  }
-
-  chrome::Navigate(&params);
-
-  return true;
-}
-
-// static
-gfx::Image* TabStripGtk::GetDropArrowImage(bool is_down) {
-  return &ui::ResourceBundle::GetSharedInstance().GetNativeImageNamed(
-      is_down ? IDR_TAB_DROP_DOWN : IDR_TAB_DROP_UP);
-}
-
-// TabStripGtk::DropInfo -------------------------------------------------------
-
-TabStripGtk::DropInfo::DropInfo(int drop_index, bool drop_before,
-                                bool point_down)
-    : drop_index(drop_index),
-      drop_before(drop_before),
-      point_down(point_down) {
-  CreateContainer();
-  drop_arrow = GetDropArrowImage(point_down);
-}
-
-TabStripGtk::DropInfo::~DropInfo() {
-  DestroyContainer();
-}
-
-gboolean TabStripGtk::DropInfo::OnExposeEvent(GtkWidget* widget,
-                                              GdkEventExpose* event) {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::DropInfo::OnExposeEvent");
-
-  if (ui::IsScreenComposited()) {
-    SetContainerTransparency();
-  } else {
-    SetContainerShapeMask();
-  }
-
-  cairo_t* cr = gdk_cairo_create(gtk_widget_get_window(widget));
-  gdk_cairo_rectangle(cr, &event->area);
-  cairo_clip(cr);
-
-  drop_arrow->ToCairo()->SetSource(cr, widget, 0, 0);
-  cairo_paint(cr);
-
-  cairo_destroy(cr);
-
-  return FALSE;
-}
-
-// Sets the color map of the container window to allow the window to be
-// transparent.
-void TabStripGtk::DropInfo::SetContainerColorMap() {
-  GdkScreen* screen = gtk_widget_get_screen(container);
-  GdkColormap* colormap = gdk_screen_get_rgba_colormap(screen);
-
-  // If rgba is not available, use rgb instead.
-  if (!colormap)
-    colormap = gdk_screen_get_rgb_colormap(screen);
-
-  gtk_widget_set_colormap(container, colormap);
-}
-
-// Sets full transparency for the container window.  This is used if
-// compositing is available for the screen.
-void TabStripGtk::DropInfo::SetContainerTransparency() {
-  cairo_t* cairo_context = gdk_cairo_create(gtk_widget_get_window(container));
-  if (!cairo_context)
-      return;
-
-  // Make the background of the dragged tab window fully transparent.  All of
-  // the content of the window (child widgets) will be completely opaque.
-
-  cairo_scale(cairo_context, static_cast<double>(drop_indicator_width),
-              static_cast<double>(drop_indicator_height));
-  cairo_set_source_rgba(cairo_context, 1.0f, 1.0f, 1.0f, 0.0f);
-  cairo_set_operator(cairo_context, CAIRO_OPERATOR_SOURCE);
-  cairo_paint(cairo_context);
-  cairo_destroy(cairo_context);
-}
-
-// Sets the shape mask for the container window to emulate a transparent
-// container window.  This is used if compositing is not available for the
-// screen.
-void TabStripGtk::DropInfo::SetContainerShapeMask() {
-  // Create a 1bpp bitmap the size of |container|.
-  GdkPixmap* pixmap = gdk_pixmap_new(NULL,
-                                     drop_indicator_width,
-                                     drop_indicator_height, 1);
-  cairo_t* cairo_context = gdk_cairo_create(GDK_DRAWABLE(pixmap));
-
-  // Set the transparency.
-  cairo_set_source_rgba(cairo_context, 1, 1, 1, 0);
-
-  // Blit the rendered bitmap into a pixmap.  Any pixel set in the pixmap will
-  // be opaque in the container window.
-  cairo_set_operator(cairo_context, CAIRO_OPERATOR_SOURCE);
-  // We don't use CairoCachedSurface::SetSource() here because we're not
-  // rendering on a display server.
-  gdk_cairo_set_source_pixbuf(cairo_context, drop_arrow->ToGdkPixbuf(), 0, 0);
-  cairo_paint(cairo_context);
-  cairo_destroy(cairo_context);
-
-  // Set the shape mask.
-  GdkWindow* gdk_window = gtk_widget_get_window(container);
-  gdk_window_shape_combine_mask(gdk_window, pixmap, 0, 0);
-  g_object_unref(pixmap);
-}
-
-void TabStripGtk::DropInfo::CreateContainer() {
-  container = gtk_window_new(GTK_WINDOW_POPUP);
-  SetContainerColorMap();
-  gtk_widget_set_app_paintable(container, TRUE);
-  g_signal_connect(container, "expose-event",
-                   G_CALLBACK(OnExposeEventThunk), this);
-  gtk_widget_add_events(container, GDK_STRUCTURE_MASK);
-  gtk_window_move(GTK_WINDOW(container), 0, 0);
-  gtk_window_resize(GTK_WINDOW(container),
-                    drop_indicator_width, drop_indicator_height);
-  gtk_widget_show_all(container);
-}
-
-void TabStripGtk::DropInfo::DestroyContainer() {
-  if (GTK_IS_WIDGET(container))
-    gtk_widget_destroy(container);
-}
-
-void TabStripGtk::StopAnimation() {
-  if (active_animation_.get())
-    active_animation_->Stop();
-}
-
-// Called from:
-// - animation tick
-void TabStripGtk::AnimationLayout(double unselected_width) {
-  int tab_height = TabGtk::GetStandardSize().height();
-  double tab_x = tab_start_x();
-  for (int i = 0; i < GetTabCount(); ++i) {
-    TabAnimation* animation = active_animation_.get();
-    if (animation)
-      tab_x += animation->GetGapWidth(i);
-    double tab_width = TabAnimation::GetCurrentTabWidth(this, animation, i);
-    double end_of_tab = tab_x + tab_width;
-    int rounded_tab_x = Round(tab_x);
-    TabGtk* tab = GetTabAt(i);
-    gfx::Rect bounds(rounded_tab_x, 0, Round(end_of_tab) - rounded_tab_x,
-                     tab_height);
-    SetTabBounds(tab, bounds);
-    tab_x = end_of_tab + GetTabHOffset(i + 1);
-  }
-  LayoutNewTabButton(tab_x, unselected_width);
-}
-
-void TabStripGtk::StartInsertTabAnimation(int index) {
-  // The TabStrip can now use its entire width to lay out Tabs.
-  available_width_for_tabs_ = -1;
-  StopAnimation();
-  active_animation_.reset(new InsertTabAnimation(this, index));
-  active_animation_->Start();
-}
-
-void TabStripGtk::StartRemoveTabAnimation(int index, WebContents* contents) {
-  if (active_animation_.get()) {
-    // Some animations (e.g. MoveTabAnimation) cause there to be a Layout when
-    // they're completed (which includes canceled). Since |tab_data_| is now
-    // inconsistent with TabStripModel, doing this Layout will crash now, so
-    // we ask the MoveTabAnimation to skip its Layout (the state will be
-    // corrected by the RemoveTabAnimation we're about to initiate).
-    active_animation_->set_layout_on_completion(false);
-    active_animation_->Stop();
-  }
-
-  active_animation_.reset(new RemoveTabAnimation(this, index, contents));
-  active_animation_->Start();
-}
-
-void TabStripGtk::StartMoveTabAnimation(int from_index, int to_index) {
-  StopAnimation();
-  active_animation_.reset(new MoveTabAnimation(this, from_index, to_index));
-  active_animation_->Start();
-}
-
-void TabStripGtk::StartResizeLayoutAnimation() {
-  StopAnimation();
-  active_animation_.reset(new ResizeLayoutAnimation(this));
-  active_animation_->Start();
-}
-
-void TabStripGtk::StartMiniTabAnimation(int index) {
-  StopAnimation();
-  active_animation_.reset(new MiniTabAnimation(this, index));
-  active_animation_->Start();
-}
-
-void TabStripGtk::StartMiniMoveTabAnimation(int from_index,
-                                            int to_index,
-                                            const gfx::Rect& start_bounds) {
-  StopAnimation();
-  active_animation_.reset(
-      new MiniMoveAnimation(this, from_index, to_index, start_bounds));
-  active_animation_->Start();
-}
-
-void TabStripGtk::FinishAnimation(TabStripGtk::TabAnimation* animation,
-                                  bool layout) {
-  active_animation_.reset(NULL);
-
-  // Reset the animation state of each tab.
-  for (int i = 0, count = GetTabCount(); i < count; ++i)
-    GetTabAt(i)->set_animating_mini_change(false);
-
-  if (layout)
-    Layout();
-}
-
-void TabStripGtk::OnMap(GtkWidget* widget) {
-  ReStack();
-}
-
-gboolean TabStripGtk::OnExpose(GtkWidget* widget, GdkEventExpose* event) {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::OnExpose");
-
-  if (gdk_region_empty(event->region))
-    return TRUE;
-
-  // If we're only repainting favicons, optimize the paint path and only draw
-  // the favicons.
-  GdkRectangle* rects;
-  gint num_rects;
-  gdk_region_get_rectangles(event->region, &rects, &num_rects);
-  qsort(rects, num_rects, sizeof(GdkRectangle), CompareGdkRectangles);
-  std::vector<int> tabs_to_repaint;
-  if (!IsDragSessionActive() &&
-      CanPaintOnlyFavicons(rects, num_rects, &tabs_to_repaint)) {
-    PaintOnlyFavicons(event, tabs_to_repaint);
-    g_free(rects);
-    return TRUE;
-  }
-  g_free(rects);
-
-  // Ideally we'd like to only draw what's needed in the damage rect, but the
-  // tab widgets overlap each other. To get the proper visual look, we need to
-  // draw tabs from the rightmost to the leftmost tab. So if we have a dirty
-  // rectangle in the center of the tabstrip, we'll have to draw all the tabs
-  // to the left of it.
-  //
-  // TODO(erg): Figure out why we can't have clip rects that don't start from
-  // x=0. jhawkins had a big comment here about how painting on one widget will
-  // cause an expose-event to be sent to the widgets underneath, but that
-  // should still obey clip rects, but doesn't seem to.
-  if (active_animation_.get() || drag_controller_.get()) {
-    // If we have an active animation or the tab is being dragged, no matter
-    // what GTK tells us our dirty rectangles are, we need to redraw the entire
-    // tabstrip.
-    event->area.width = bounds_.width();
-  } else {
-    // Expand whatever dirty rectangle we were given to the area from the
-    // leftmost edge of the tabstrip to the rightmost edge of the dirty
-    // rectangle given.
-    //
-    // Doing this frees up CPU when redrawing the tabstrip with throbbing
-    // tabs. The most likely tabs to throb are pinned or minitabs which live on
-    // the very leftmost of the tabstrip.
-    event->area.width += event->area.x;
-  }
-
-  event->area.x = 0;
-  event->area.y = 0;
-  event->area.height = bounds_.height();
-  gdk_region_union_with_rect(event->region, &event->area);
-
-  // Paint the New Tab button.
-  gtk_container_propagate_expose(GTK_CONTAINER(tabstrip_.get()),
-      newtab_button_->widget(), event);
-
-  // Paint the tabs in reverse order, so they stack to the left.
-  TabGtk* selected_tab = NULL;
-  int tab_count = GetTabCount();
-  for (int i = tab_count - 1; i >= 0; --i) {
-    TabGtk* tab = GetTabAt(i);
-    // We must ask the _Tab's_ model, not ourselves, because in some situations
-    // the model will be different to this object, e.g. when a Tab is being
-    // removed after its WebContents has been destroyed.
-    if (!tab->IsActive()) {
-      gtk_container_propagate_expose(GTK_CONTAINER(tabstrip_.get()),
-                                     tab->widget(), event);
-    } else {
-      selected_tab = tab;
-    }
-  }
-
-  // Paint the selected tab last, so it overlaps all the others.
-  if (selected_tab) {
-    gtk_container_propagate_expose(GTK_CONTAINER(tabstrip_.get()),
-                                   selected_tab->widget(), event);
-  }
-
-  return TRUE;
-}
-
-void TabStripGtk::OnSizeAllocate(GtkWidget* widget, GtkAllocation* allocation) {
-  TRACE_EVENT0("ui::gtk", "TabStripGtk::OnSizeAllocate");
-
-  gfx::Rect bounds = gfx::Rect(allocation->x, allocation->y,
-      allocation->width, allocation->height);
-
-  // Nothing to do if the bounds are the same.  If we don't catch this, we'll
-  // get an infinite loop of size-allocate signals.
-  if (bounds_ == bounds)
-    return;
-
-  SetBounds(bounds);
-
-  // No tabs, nothing to layout.  This happens when a browser window is created
-  // and shown before tabs are added (as in a popup window).
-  if (GetTabCount() == 0)
-    return;
-
-  // When there is only one tab, Layout() so we don't animate it. With more
-  // tabs, we should always attempt a resize unless we already have one coming
-  // up in our message loop.
-  if (GetTabCount() == 1) {
-    Layout();
-  } else if (!layout_factory_.HasWeakPtrs()) {
-    base::MessageLoop::current()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&TabStripGtk::Layout, layout_factory_.GetWeakPtr()),
-        base::TimeDelta::FromMilliseconds(kLayoutAfterSizeAllocateMs));
-  }
-}
-
-gboolean TabStripGtk::OnDragMotion(GtkWidget* widget, GdkDragContext* context,
-                                   gint x, gint y, guint time) {
-  UpdateDropIndex(context, x, y);
-  return TRUE;
-}
-
-gboolean TabStripGtk::OnDragDrop(GtkWidget* widget, GdkDragContext* context,
-                                 gint x, gint y, guint time) {
-  if (!drop_info_.get())
-    return FALSE;
-
-  GdkAtom target = gtk_drag_dest_find_target(widget, context, NULL);
-  if (target != GDK_NONE)
-    gtk_drag_finish(context, FALSE, FALSE, time);
-  else
-    gtk_drag_get_data(widget, context, target, time);
-
-  return TRUE;
-}
-
-gboolean TabStripGtk::OnDragLeave(GtkWidget* widget, GdkDragContext* context,
-                                  guint time) {
-  // Destroy the drop indicator.
-  drop_info_->DestroyContainer();
-
-  // Cancel any pending tab transition.
-  hover_tab_selector_.CancelTabTransition();
-
-  return FALSE;
-}
-
-gboolean TabStripGtk::OnDragDataReceived(GtkWidget* widget,
-                                         GdkDragContext* context,
-                                         gint x, gint y,
-                                         GtkSelectionData* data,
-                                         guint info, guint time) {
-  bool success = false;
-
-  if (info == ui::TEXT_URI_LIST ||
-      info == ui::NETSCAPE_URL ||
-      info == ui::TEXT_PLAIN) {
-    success = CompleteDrop(gtk_selection_data_get_data(data),
-                           info == ui::TEXT_PLAIN);
-  }
-
-  gtk_drag_finish(context, success, FALSE, time);
-  return TRUE;
-}
-
-void TabStripGtk::OnNewTabClicked(GtkWidget* widget) {
-  GdkEvent* event = gtk_get_current_event();
-  DCHECK_EQ(event->type, GDK_BUTTON_RELEASE);
-  int mouse_button = event->button.button;
-  gdk_event_free(event);
-
-  switch (mouse_button) {
-    case 1:
-      content::RecordAction(UserMetricsAction("NewTab_Button"));
-      UMA_HISTOGRAM_ENUMERATION("Tab.NewTab", TabStripModel::NEW_TAB_BUTTON,
-                                TabStripModel::NEW_TAB_ENUM_COUNT);
-      model_->delegate()->AddTabAt(GURL(), -1, true);
-      break;
-    case 2: {
-      // On middle-click, try to parse the PRIMARY selection as a URL and load
-      // it instead of creating a blank page.
-      GURL url;
-      if (!gtk_util::URLFromPrimarySelection(model_->profile(), &url))
-        return;
-
-      Browser* browser = window_->browser();
-      DCHECK(browser);
-      chrome::AddSelectedTabWithURL(
-          browser, url, content::PAGE_TRANSITION_TYPED);
-      break;
-    }
-    default:
-      NOTREACHED() << "Got click on new tab button with unhandled mouse "
-                   << "button " << mouse_button;
-  }
-}
-
-void TabStripGtk::SetTabBounds(TabGtk* tab, const gfx::Rect& bounds) {
-  gfx::Rect bds = bounds;
-  bds.set_x(gtk_util::MirroredLeftPointForRect(tabstrip_.get(), bounds));
-  tab->SetBounds(bds);
-  gtk_fixed_move(GTK_FIXED(tabstrip_.get()), tab->widget(),
-                 bds.x(), bds.y());
-}
-
-bool TabStripGtk::CanPaintOnlyFavicons(const GdkRectangle* rects,
-    int num_rects, std::vector<int>* tabs_to_paint) {
-  // |rects| are sorted so we just need to scan from left to right and compare
-  // it to the tab favicon positions from left to right.
-  int t = 0;
-  for (int r = 0; r < num_rects; ++r) {
-    while (t < GetTabCount()) {
-      TabGtk* tab = GetTabAt(t);
-      if (GdkRectMatchesTabFaviconBounds(rects[r], tab) &&
-          tab->ShouldShowIcon()) {
-        tabs_to_paint->push_back(t);
-        ++t;
-        break;
-      }
-      ++t;
-    }
-  }
-  return static_cast<int>(tabs_to_paint->size()) == num_rects;
-}
-
-void TabStripGtk::PaintOnlyFavicons(GdkEventExpose* event,
-                                    const std::vector<int>& tabs_to_paint) {
-  cairo_t* cr = gdk_cairo_create(GDK_DRAWABLE(event->window));
-  for (size_t i = 0; i < tabs_to_paint.size(); ++i) {
-    cairo_save(cr);
-    GetTabAt(tabs_to_paint[i])->PaintFaviconArea(tabstrip_.get(), cr);
-    cairo_restore(cr);
-  }
-
-  cairo_destroy(cr);
-}
-
-CustomDrawButton* TabStripGtk::MakeNewTabButton() {
-  CustomDrawButton* button = new CustomDrawButton(IDR_NEWTAB_BUTTON,
-      IDR_NEWTAB_BUTTON_P, IDR_NEWTAB_BUTTON_H, 0);
-
-  gtk_widget_set_tooltip_text(button->widget(),
-      l10n_util::GetStringUTF8(IDS_TOOLTIP_NEW_TAB).c_str());
-
-  // Let the middle mouse button initiate clicks as well.
-  gtk_util::SetButtonTriggersNavigation(button->widget());
-  g_signal_connect(button->widget(), "clicked",
-                   G_CALLBACK(OnNewTabClickedThunk), this);
-  gtk_widget_set_can_focus(button->widget(), FALSE);
-  gtk_fixed_put(GTK_FIXED(tabstrip_.get()), button->widget(), 0, 0);
-
-  return button;
-}
-
-void TabStripGtk::SetNewTabButtonBackground() {
-  SkColor color = theme_service_->GetColor(
-      ThemeProperties::COLOR_BUTTON_BACKGROUND);
-  SkBitmap background = theme_service_->GetImageNamed(
-      IDR_THEME_WINDOW_CONTROL_BACKGROUND).AsBitmap();
-  SkBitmap mask = theme_service_->GetImageNamed(
-      IDR_NEWTAB_BUTTON_MASK).AsBitmap();
-  newtab_button_->SetBackground(color, background, mask);
-}