content: Split web_drag_dest_gtk.cc into chrome/ and content/ parts.

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

 // Copyright (c) 2011 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/dragged_view_gtk.h"
 
 #include <gdk/gdk.h>
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "base/stl_util.h"
 #include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/browser/ui/gtk/tabs/drag_data.h"
 #include "chrome/browser/ui/gtk/tabs/tab_renderer_gtk.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "content/browser/renderer_host/backing_store_gtk.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "third_party/skia/include/core/SkShader.h"
+#include "ui/base/gtk/gtk_screen_utils.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/gtk_util.h"
 
 namespace {
 
 // The size of the dragged window frame.
 const int kDragFrameBorderSize = 1;
 const int kTwiceDragFrameBorderSize = 2 * kDragFrameBorderSize;
 
 // Used to scale the dragged window sizes.
@@ skipping 95 matching lines @@
   attached_ = true;
   parent_window_width_ = window_width;
   normal_width_ = normal_width;
   mini_width_ = mini_width;
 
   int dragged_tab_width =
       drag_data_->GetSourceTabData()->mini_ ? mini_width : normal_width;
 
   Resize(dragged_tab_width);
 
-  if (gtk_util::IsScreenComposited())
+  if (ui::IsScreenComposited())
     gdk_window_set_opacity(container_->window, kOpaqueAlpha);
 }
 
 void DraggedViewGtk::Resize(int width) {
   attached_tab_size_.set_width(width);
   ResizeContainer();
 }
 
 void DraggedViewGtk::Detach() {
   attached_ = false;
   ResizeContainer();
 
-  if (gtk_util::IsScreenComposited())
+  if (ui::IsScreenComposited())
     gdk_window_set_opacity(container_->window, kTransparentAlpha);
 }
 
 void DraggedViewGtk::Update() {
   gtk_widget_queue_draw(container_);
 }
 
 int DraggedViewGtk::GetWidthInTabStripFromTo(int from, int to) {
   DCHECK(from <= static_cast<int>(drag_data_->size()));
   DCHECK(to <= static_cast<int>(drag_data_->size()));
@@ skipping 197 matching lines @@
   }
 
   cairo_destroy(cairo_context);
 
   // Set the shape mask.
   gdk_window_shape_combine_mask(container_->window, pixmap, 0, 0);
   g_object_unref(pixmap);
 }
 
 gboolean DraggedViewGtk::OnExpose(GtkWidget* widget, GdkEventExpose* event) {
-  if (gtk_util::IsScreenComposited())
+  if (ui::IsScreenComposited())
     SetContainerTransparency();
   else
     SetContainerShapeMask();
 
   // Only used when not attached.
   int tab_height = static_cast<int>(
       kScalingFactor * renderers_[drag_data_->source_tab_index()]->height());
 
   // Draw the render area.
   BackingStore* backing_store = drag_data_->GetSourceTabContents()->
@@ skipping 62 matching lines @@
     if (!attached_) {
       paint_at = widget_width / kScalingFactor -
           GetWidthInTabStripFromTo(0, index + 1);
     }
   }
 
   cairo_set_source_surface(cr, surface, paint_at, 0);
   cairo_paint(cr);
   cairo_surface_destroy(surface);
 }