Generate thumbnails in the browser process.

chrome/browser/renderer_host/render_view_host.h

Index: chrome/browser/renderer_host/render_view_host.h
diff --git a/chrome/browser/renderer_host/render_view_host.h b/chrome/browser/renderer_host/render_view_host.h
index 5278eff06799502e4d201ccd232a80f5253bb980..4755dd1a0b1ee593ea7542745989078d74b1e53b 100644
--- a/chrome/browser/renderer_host/render_view_host.h
+++ b/chrome/browser/renderer_host/render_view_host.h
@@ -38,7 +38,6 @@ class ViewMsg_Navigate;
 struct ContentSettings;
 struct ContextMenuParams;
 struct MediaPlayerAction;
-struct ThumbnailScore;
 struct ViewHostMsg_AccessibilityNotification_Params;
 struct ViewHostMsg_DidPreviewDocument_Params;
 struct ViewHostMsg_DidPrintPage_Params;
@@ -306,9 +305,6 @@ class RenderViewHost : public RenderWidgetHost {
   // the data is available.
   void GetApplicationInfo(int32 page_id);
 
-  // Captures a thumbnail representation of the page.
-  void CaptureThumbnail();
-
   // Captures a snapshot of the page.
   void CaptureSnapshot();
 
@@ -542,6 +538,8 @@ class RenderViewHost : public RenderWidgetHost {
                         int renderer_id,
                         GURL* url);
 
+  const gfx::Size& last_scroll_offset() const { return last_scroll_offset_; }
+
  protected:
   // RenderWidgetHost protected overrides.
   virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
@@ -570,9 +568,6 @@ class RenderViewHost : public RenderWidgetHost {
   void OnMsgUpdateTitle(int32 page_id, const std::wstring& title);
   void OnMsgUpdateEncoding(const std::string& encoding);
   void OnMsgUpdateTargetURL(int32 page_id, const GURL& url);
-  void OnMsgThumbnail(const GURL& url,
-                      const ThumbnailScore& score,
-                      const SkBitmap& bitmap);
   void OnMsgScreenshot(const SkBitmap& bitmap);
   void OnMsgClose();
   void OnMsgRequestMove(const gfx::Rect& pos);
@@ -703,6 +698,7 @@ class RenderViewHost : public RenderWidgetHost {
   void OnUpdateContentRestrictions(int restrictions);
   void OnPagesReadyForPreview(
       const ViewHostMsg_DidPreviewDocument_Params& params);
+  void OnUpdateScrollOffset(const gfx::Size& size);
 
 #if defined(OS_MACOSX)
   void OnMsgShowPopup(const ViewHostMsg_ShowPopup_Params& params);
@@ -791,6 +787,9 @@ class RenderViewHost : public RenderWidgetHost {
   // The termination status of the last render view that terminated.
   base::TerminationStatus render_view_termination_status_;
 
+  // ...
+  gfx::Size last_scroll_offset_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };