Adds support for showing the match preview on views. It's behind the

chrome/browser/views/frame/browser_view.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_VIEWS_FRAME_BROWSER_VIEW_H_
 #define CHROME_BROWSER_VIEWS_FRAME_BROWSER_VIEW_H_
 #pragma once
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "app/menus/simple_menu_model.h"
 #include "base/scoped_ptr.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/views/frame/browser_bubble_host.h"
 #include "chrome/browser/views/frame/browser_frame.h"
 #include "chrome/browser/views/infobars/infobar_container.h"
 #include "chrome/browser/views/tabs/tab_strip.h"
 #include "chrome/browser/views/tabs/base_tab_strip.h"
 #include "chrome/browser/views/unhandled_keyboard_event_handler.h"
+#include "chrome/common/notification_registrar.h"
 #include "gfx/native_widget_types.h"
 #include "views/window/client_view.h"
 #include "views/window/window_delegate.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/hang_monitor/hung_plugin_action.h"
 #include "chrome/browser/hang_monitor/hung_window_detector.h"
 #include "views/controls/menu/native_menu_win.h"
 #endif
 
@@ skipping 291 matching lines @@
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // Overridden from TabStripModelObserver:
   virtual void TabDetachedAt(TabContents* contents, int index);
   virtual void TabDeselectedAt(TabContents* contents, int index);
   virtual void TabSelectedAt(TabContents* old_contents,
                              TabContents* new_contents,
                              int index,
                              bool user_gesture);
+  virtual void TabReplacedAt(TabContents* old_contents,
+                             TabContents* new_contents,
+                             int index,
+                             TabStripModelObserver::TabReplaceType type);
   virtual void TabStripEmpty();
 
   // Overridden from menus::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdChecked(int command_id) const;
   virtual bool IsCommandIdEnabled(int command_id) const;
   virtual bool GetAcceleratorForCommandId(int command_id,
                                           menus::Accelerator* accelerator);
   virtual bool IsLabelForCommandIdDynamic(int command_id) const;
   virtual string16 GetLabelForCommandId(int command_id) const;
   virtual void ExecuteCommand(int command_id);
@@ skipping 57 matching lines @@
   // multiple times over the life of the browser, and is run when the display
   // mode for the tabstrip changes from horizontal to vertical.
   virtual void InitTabStrip(TabStripModel* tab_strip_model);
 
   // Browser window related initializations.
   virtual void Init();
 
  private:
   friend class BrowserViewLayout;
 
+  class ContentsContainer;
+
 #if defined(OS_WIN)
   // Creates the system menu.
   void InitSystemMenu();
 #endif
 
   // Returns the BrowserViewLayout.
   BrowserViewLayout* GetBrowserViewLayout() const;
 
   // Layout the Status Bubble.
   void LayoutStatusBubble(int top);
@@ skipping 45 matching lines @@
 
   // Retrieves the command id for the specified Windows app command.
   int GetCommandIDForAppCommandID(int app_command_id) const;
 
   // Callback for the loading animation(s) associated with this view.
   void LoadingAnimationCallback();
 
   // Initialize the hung plugin detector.
   void InitHangMonitor();
 
-  // Initialize class statics.
-  static void InitClass();
+  // Shows the match preview for the selected tab contents.
+  void ShowMatchPreview();
+
+  // Hides the match preview for the selected tab contents.
+  void HideMatchPreview();
+
+  // Invoked from TabSelectedAt or when the match preview is made active.  Is
+  // |change_tab_contents| is true, |new_contents| is added to the view
+  // hierarchy, if |change_tab_contents| is false, it's assumed |new_contents|
+  // has already been added to the view hierarchy.
+  void ProcessTabSelected(TabContents* new_contents, bool change_tab_contents);
 
   // Last focused view that issued a tab traversal.
   int last_focused_view_storage_id_;
 
   // The BrowserFrame that hosts this view.
   BrowserFrame* frame_;
 
   // The Browser object we are associated with.
   scoped_ptr<Browser> browser_;
 
@@ skipping 16 matching lines @@
 
   // The InfoBarContainer that contains InfoBars for the current tab.
   InfoBarContainer* infobar_container_;
 
   // The view that contains the selected TabContents.
   TabContentsContainer* contents_container_;
 
   // The view that contains devtools window for the selected TabContents.
   TabContentsContainer* devtools_container_;
 
+  // The view that contains the match preview TabContents.
+  TabContentsContainer* preview_container_;
+
+  // The view managing both the contents_container_ and preview_container_.
+  ContentsContainer* contents_;
+
   // Split view containing the contents container and devtools container.
   views::SingleSplitView* contents_split_;
 
   // Tracks and stores the last focused view which is not the
   // devtools_container_ or any of its children. Used to restore focus once
   // the devtools_container_ is hidden.
   scoped_ptr<views::ExternalFocusTracker> devtools_focus_tracker_;
 
   // The Status information bubble that appears at the bottom of the window.
   scoped_ptr<StatusBubbleViews> status_bubble_;
@@ skipping 41 matching lines @@
   // The timer used to update frames for the Loading Animation.
   base::RepeatingTimer<BrowserView> loading_animation_timer_;
 
   // A bottom bar for showing extensions.
   ExtensionShelf* extension_shelf_;
 
   UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
 
   scoped_ptr<AccessibleViewHelper> accessible_view_helper_;
 
+  NotificationRegistrar registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserView);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_FRAME_BROWSER_VIEW_H_