Combine ViewHostMsg_{Paint,Scroll}Rect into one IPC....

chrome/browser/renderer_host/render_widget_host.h

 // Copyright (c) 2009 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_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 
 #include <deque>
 
 #include "app/gfx/native_widget_types.h"
@@ skipping 20 matching lines @@
 struct WebScreenInfo;
 }
 
 class BackingStore;
 class PaintObserver;
 class RenderProcessHost;
 class RenderWidgetHostView;
 class RenderWidgetHostPaintingObserver;
 class TransportDIB;
 class WebCursor;
-struct ViewHostMsg_PaintRect_Params;
-struct ViewHostMsg_ScrollRect_Params;
 struct ViewHostMsg_ShowPopup_Params;
+struct ViewHostMsg_UpdateRect_Params;
 
 // This class manages the browser side of a browser<->renderer HWND connection.
 // The HWND lives in the browser process, and windows events are sent over
 // IPC to the corresponding object in the renderer.  The renderer paints into
 // shared memory, which we transfer to a backing store and blit to the screen
 // when Windows sends us a WM_PAINT message.
 //
 // How Shutdown Works
 //
 // There are two situations in which this object, a RenderWidgetHost, can be
@@ skipping 352 matching lines @@
   // Called if we know the renderer is responsive. When we currently thing the
   // renderer is unresponsive, this will clear that state and call
   // NotifyRendererResponsive.
   void RendererIsResponsive();
 
   // IPC message handlers
   void OnMsgRenderViewReady();
   void OnMsgRenderViewGone();
   void OnMsgClose();
   void OnMsgRequestMove(const gfx::Rect& pos);
-  void OnMsgPaintRect(const ViewHostMsg_PaintRect_Params& params);
-  void OnMsgScrollRect(const ViewHostMsg_ScrollRect_Params& params);
+  void OnMsgUpdateRect(const ViewHostMsg_UpdateRect_Params& params);
   void OnMsgInputEventAck(const IPC::Message& message);
   void OnMsgFocus();
   void OnMsgBlur();
   virtual void OnMsgFocusedNodeChanged();
 
   void OnMsgSetCursor(const WebCursor& cursor);
   // Using int instead of ViewHostMsg_ImeControl for control's type to avoid
   // having to bring in render_messages.h in a header file.
   void OnMsgImeUpdateStatus(int control, const gfx::Rect& caret_rect);
 #if defined(OS_LINUX)
   void OnMsgCreatePluginContainer(gfx::PluginWindowHandle id);
   void OnMsgDestroyPluginContainer(gfx::PluginWindowHandle id);
 #elif defined(OS_MACOSX)
   void OnMsgShowPopup(const ViewHostMsg_ShowPopup_Params& params);
   void OnMsgGetScreenInfo(gfx::NativeViewId view,
                           WebKit::WebScreenInfo* results);
   void OnMsgGetWindowRect(gfx::NativeViewId window_id, gfx::Rect* results);
   void OnMsgGetRootWindowRect(gfx::NativeViewId window_id, gfx::Rect* results);
 #endif
 
   // Paints the given bitmap to the current backing store at the given location.
   void PaintBackingStoreRect(TransportDIB* dib,
                              const gfx::Rect& bitmap_rect,
                              const std::vector<gfx::Rect>& copy_rects,
                              const gfx::Size& view_size);
 
   // Scrolls the given |clip_rect| in the backing by the given dx/dy amount. The
   // |dib| and its corresponding location |bitmap_rect| in the backing store
   // is the newly painted pixels by the renderer.
-  void ScrollBackingStoreRect(TransportDIB* dib,
-                              const gfx::Rect& bitmap_rect,
-                              int dx, int dy,
-                              const gfx::Rect& clip_rect,
+  void ScrollBackingStoreRect(int dx, int dy, const gfx::Rect& clip_rect,
                               const gfx::Size& view_size);
 
   // Called by OnMsgInputEventAck() to process a keyboard event ack message.
   void ProcessKeyboardEventAck(int type, bool processed);
 
   // 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).
@@ skipping 105 matching lines @@
   // but the Char event generated by alt-2 may also activate a HTML element
   // if its accesskey happens to be "2", then the user may get confused when
   // switching back to the original tab, because the content may already be
   // changed.
   bool suppress_next_char_events_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_