Linux: server side backing stores

chrome/browser/renderer_host/render_widget_host_view_win.h

 // Copyright (c) 2006-2008 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_VIEW_WIN_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_WIN_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcrack.h>
 #include <atlmisc.h>
 
 #include "base/task.h"
 #include "chrome/browser/ime_input.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "webkit/glue/webcursor.h"
 
 namespace gfx {
 class Size;
 class Rect;
 }
 namespace IPC {
 class Message;
 }
+
+class BackingStore;
 class RenderWidgetHost;
 class WebMouseEvent;
 
 typedef CWinTraits<WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS, 0>
     RenderWidgetHostHWNDTraits;
 
 static const wchar_t* const kRenderWidgetHostHWNDClass =
     L"Chrome_RenderWidgetHostHWND";
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 95 matching lines @@
   virtual gfx::Rect GetViewBounds() const;
   virtual void UpdateCursor(const WebCursor& cursor);
   virtual void UpdateCursorIfOverSelf();
   virtual void SetIsLoading(bool is_loading);
   virtual void IMEUpdateStatus(int control, const gfx::Rect& caret_rect);
   virtual void DidPaintRect(const gfx::Rect& rect);
   virtual void DidScrollRect(const gfx::Rect& rect, int dx, int dy);
   virtual void RenderViewGone();
   virtual void Destroy();
   virtual void SetTooltipText(const std::wstring& tooltip_text);
+  virtual BackingStore* AllocBackingStore(const gfx::Size& size);
 
  protected:
   // Windows Message Handlers
   LRESULT OnCreate(CREATESTRUCT* create_struct);
   void OnActivate(UINT, BOOL, HWND);
   void OnDestroy();
   void OnPaint(HDC dc);
   void OnNCPaint(HRGN update_region);
   LRESULT OnEraseBkgnd(HDC dc);
   LRESULT OnSetCursor(HWND window, UINT hittest_code, UINT mouse_message_id);
@@ skipping 124 matching lines @@
   // Whether the renderer is made accessible.
   // TODO(jcampan): http://b/issue?id=1432077 This is a temporary work-around
   // until that bug is fixed.
   bool renderer_accessible_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewWin);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_WIN_H_