Send resize event when the screen info changes.

content/browser/renderer_host/render_widget_host_impl.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_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 533 matching lines @@
   virtual bool IsFullscreenGranted() const;
 
   // Indicates if the render widget host should track the render widget's size
   // as opposed to visa versa.
   void SetAutoResize(bool enable,
                      const gfx::Size& min_size,
                      const gfx::Size& max_size);
 
   // Fills in the |resize_params| struct.
   // Returns |false| if the update is redundant, |true| otherwise.
-  bool GetResizeParams(ViewMsg_Resize_Params* resize_params);
+  bool GetResizeParams(ViewMsg_Resize_Params* resize_params) const;
 
   // Sets the |resize_params| that were sent to the renderer bundled with the
   // request to create a new RenderWidget.
   void SetInitialRenderSizeParams(const ViewMsg_Resize_Params& resize_params);
 
   // Expose increment/decrement of the in-flight event count, so
   // RenderViewHostImpl can account for in-flight beforeunload/unload events.
   int increment_in_flight_event_count() { return ++in_flight_event_count_; }
   int decrement_in_flight_event_count() {
     DCHECK_GT(in_flight_event_count_, 0);
     return --in_flight_event_count_;
   }
 
+  // Update screen_info_ if needed.
+  // Returns whether screen_info_ was updated.
+  bool UpdateScreenInfo();
+
   // The View associated with the RenderViewHost. The lifetime of this object
   // is associated with the lifetime of the Render process. If the Renderer
   // crashes, its View is destroyed and this pointer becomes NULL, even though
   // render_view_host_ lives on to load another URL (creating a new View while
   // doing so).
   RenderWidgetHostViewBase* view_;
 
   // A weak pointer to the view. The above pointer should be weak, but changing
   // that to be weak causes crashes on Android.
   // TODO(ccameron): Fix this.
@@ skipping 267 matching lines @@
   bool is_focused_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_