Replace SkBitmap with gfx::Image in the ImageFetcher API.

chrome/browser/search/thumbnail_source.h

Index: chrome/browser/search/thumbnail_source.h
diff --git a/chrome/browser/search/thumbnail_source.h b/chrome/browser/search/thumbnail_source.h
index 5e17f46d4108d523a8f925ca1cfda06fef95dc50..362ed394a70e482a8f09266e272b64610bd5bc51 100644
--- a/chrome/browser/search/thumbnail_source.h
+++ b/chrome/browser/search/thumbnail_source.h
@@ -21,6 +21,10 @@ namespace base {
 class RefCountedMemory;
 }
 
+namespace gfx {
+class Image;
+}
+
 namespace image_fetcher {
 class ImageFetcher;
 }
@@ -61,7 +65,7 @@ class ThumbnailSource : public content::URLDataSource {
   void SendFetchedUrlImage(
       const content::URLDataSource::GotDataCallback& callback,
       const GURL& url,
-      const SkBitmap* bitmap);
+      const gfx::Image& image);
 
   // Raw PNG representation of the thumbnail to show when the thumbnail
   // database doesn't have a thumbnail for a webpage.