Pass the ImageSkia by pointer instead of by reference, which will create shallow copy.

chrome/browser/ui/metro_pin_tab_helper_win.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/metro_pin_tab_helper_win.h"
 
 #include <set>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ skipping 319 matching lines @@
     for (std::vector<SkBitmap>::const_iterator iter = bitmaps.begin();
          iter != bitmaps.end();
          ++iter) {
 
       // If the new bitmap is too big, ignore it.
       if (iter->height() > kMaxIconSize || iter->width() > kMaxIconSize)
         continue;
 
       // If we don't have a best candidate yet, this is better so just grab it.
       if (best_candidate_.isNull()) {
-        best_candidate_ = gfx::ImageSkia(*iter).DeepCopy();
+        best_candidate_ = *gfx::ImageSkia(*iter).DeepCopy().get();
         continue;
       }
 
       // If it is smaller than our best one so far, ignore it.
       if (iter->height() <= best_candidate_.height() ||
           iter->width() <= best_candidate_.width()) {
         continue;
       }
 
       // Othewise it is our new best candidate.
-      best_candidate_ = gfx::ImageSkia(*iter).DeepCopy();
+      best_candidate_ = *gfx::ImageSkia(*iter).DeepCopy().get();
     }
    }
 
   // If there are no more outstanding requests, pin the page on the FILE thread.
   // Once this happens this downloader has done its job, so delete it.
   if (in_progress_requests_.empty()) {
     scoped_refptr<PinPageTaskRunner> runner(
         new PinPageTaskRunner(title_, url_, best_candidate_));
     runner->Run();
     helper_->FaviconDownloaderFinished();
@@ skipping 26 matching lines @@
 
 void MetroPinTabHelper::TogglePinnedToStartScreen() {
   if (IsPinned()) {
     UnPinPageFromStartScreen();
     return;
   }
 
   GURL url = web_contents()->GetURL();
   string16 url_str = UTF8ToUTF16(url.spec());
   string16 title = web_contents()->GetTitle();
+  // TODO(oshima): Use scoped_ptr::Pass to pass it to other thread.
   gfx::ImageSkia favicon;
   FaviconTabHelper* favicon_tab_helper = FaviconTabHelper::FromWebContents(
       web_contents());
   if (favicon_tab_helper->FaviconIsValid())
-    favicon = favicon_tab_helper->GetFavicon().AsImageSkia().DeepCopy();
+    favicon = *favicon_tab_helper->GetFavicon().AsImageSkia().DeepCopy().get();
 
   favicon_downloader_.reset(new FaviconDownloader(this, title, url_str,
                                                   favicon));
   favicon_downloader_->Start(web_contents()->GetRenderViewHost(),
                              favicon_url_candidates_);
 }
 
 void MetroPinTabHelper::DidNavigateMainFrame(
     const content::LoadCommittedDetails& /*details*/,
     const content::FrameNavigateParams& /*params*/) {
@@ skipping 47 matching lines @@
   }
 
   GURL url = web_contents()->GetURL();
   string16 tile_id = GenerateTileId(UTF8ToUTF16(url.spec()));
   metro_un_pin_from_start_screen(tile_id);
 }
 
 void MetroPinTabHelper::FaviconDownloaderFinished() {
   favicon_downloader_.reset();
 }