Support in-browser thumbnailing on Windows XP.

chrome/browser/tab_contents/thumbnail_generator.h

Index: chrome/browser/tab_contents/thumbnail_generator.h
diff --git a/chrome/browser/tab_contents/thumbnail_generator.h b/chrome/browser/tab_contents/thumbnail_generator.h
index 14752972ae45c464906c029b8fc9f7d7c29b7d88..7879c5c6f5e9b52facfdf49b54d62d399ffb8863 100644
--- a/chrome/browser/tab_contents/thumbnail_generator.h
+++ b/chrome/browser/tab_contents/thumbnail_generator.h
@@ -144,8 +144,14 @@ class ThumbnailGenerator : public content::NotificationObserver,
 
   // Called when the bitmap for generating a thumbnail is ready after the
   // AsyncUpdateThumbnail invocation. This runs on the UI thread.
-  void AsyncUpdateThumbnailFinish(
-      base::WeakPtr<content::WebContents> web_contents,
+  void UpdateThumbnailWithBitmap(
+      const base::WeakPtr<content::WebContents>& web_contents,
+      const SkBitmap& bitmap);
+
+  // Called when the canvas for generating a thumbnail is ready after the
+  // AsyncUpdateThumbnail invocation. This runs on the UI thread.
+  void UpdateThumbnailWithCanvas(
+      const base::WeakPtr<content::WebContents>& web_contents,
       skia::PlatformCanvas* temp_canvas,
       bool result);