Listen to Display reconfiguration and notify DisplayObservers on Mac.

content/browser/renderer_host/render_widget_host_view_mac.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 #include <IOSurface/IOSurfaceAPI.h>
 #include <list>
@@ skipping 13 matching lines @@
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/software_frame_manager.h"
 #include "content/common/content_export.h"
 #include "content/common/cursors/webcursor.h"
 #include "content/common/edit_command.h"
 #import "content/public/browser/render_widget_host_view_mac_base.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "ui/base/cocoa/base_view.h"
 #include "ui/base/cocoa/remote_layer_api.h"
+#include "ui/gfx/display_observer.h"
 
 struct ViewHostMsg_TextInputState_Params;
 
 namespace content {
 class CompositingIOSurfaceMac;
 class CompositingIOSurfaceContext;
 class RenderWidgetHostViewMac;
 class RenderWidgetHostViewMacEditCommandHelper;
 class WebContents;
 }
@@ skipping 168 matching lines @@
 //     If the render process dies, the RenderWidgetHost* goes away and all
 //     references to it must become NULL."
 //
 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
 class CONTENT_EXPORT RenderWidgetHostViewMac
     : public RenderWidgetHostViewBase,
       public DelegatedFrameHostClient,
       public BrowserCompositorViewClient,
       public IPC::Sender,
       public SoftwareFrameManagerClient,
-      public CompositingIOSurfaceLayerClient {
+      public CompositingIOSurfaceLayerClient,
+      public gfx::DisplayObserver {
  public:
   // The view will associate itself with the given widget. The native view must
   // be hooked up immediately to the view hierarchy, or else when it is
   // deleted it will delete this out from under the caller.
   explicit RenderWidgetHostViewMac(RenderWidgetHost* widget);
   virtual ~RenderWidgetHostViewMac();
 
   RenderWidgetHostViewCocoa* cocoa_view() const { return cocoa_view_; }
 
   // |delegate| is used to separate out the logic from the NSResponder delegate.
@@ skipping 109 matching lines @@
   // SoftwareFrameManagerClient implementation:
   virtual void SoftwareFrameWasFreed(
       uint32 output_surface_id, unsigned frame_id) OVERRIDE;
   virtual void ReleaseReferencesToSoftwareFrame() OVERRIDE;
 
   virtual SkBitmap::Config PreferredReadbackFormat() OVERRIDE;
 
   // CompositingIOSurfaceLayerClient implementation.
   virtual void AcceleratedLayerDidDrawFrame(bool succeeded) OVERRIDE;
 
+  // gfx::DisplayObserver implementation.
+  virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
+  virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
+  virtual void OnDisplayMetricsChanged(const gfx::Display& display,
+                                       uint32_t metrics) OVERRIDE;
+
   // Forwards the mouse event to the renderer.
   void ForwardMouseEvent(const blink::WebMouseEvent& event);
 
   void KillSelf();
 
   void SetTextInputActive(bool active);
 
   // Sends completed plugin IME notification and text back to the renderer.
   void PluginImeCompositionCompleted(const base::string16& text, int plugin_id);
 
@@ skipping 262 matching lines @@
   scoped_ptr<RenderWidgetHostViewFrameSubscriber> frame_subscriber_;
 
   base::WeakPtrFactory<RenderWidgetHostViewMac>
       software_frame_weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_