Plugs in the new thumbnailing algorithm to ThumbnailTabHelper.

chrome/browser/thumbnails/thumbnail_tab_helper.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/thumbnails/thumbnail_tab_helper.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/thumbnails/render_widget_snapshot_taker.h"
 #include "chrome/browser/thumbnails/thumbnail_service.h"
@@ skipping 44 matching lines @@
 
 // Feed the constructed thumbnail to the thumbnail service.
 void UpdateThumbnail(const ThumbnailingContext& context,
                      const SkBitmap& thumbnail) {
   gfx::Image image = gfx::Image::CreateFrom1xBitmap(thumbnail);
   context.service->SetPageThumbnail(context, image);
   VLOG(1) << "Thumbnail taken for " << context.url << ": "
           << context.score.ToString();
 }
 
-void ProcessCapturedBitmap(ThumbnailingContext* context,
-                           ThumbnailingAlgorithm* algorithm,
+void ProcessCapturedBitmap(scoped_refptr<ThumbnailingContext> context,
+                           scoped_refptr<ThumbnailingAlgorithm> algorithm,
                            bool succeeded,
                            const SkBitmap& bitmap) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (!succeeded)
     return;
 
   algorithm->ProcessBitmap(context, base::Bind(&UpdateThumbnail), bitmap);
 }
 
 void GotSnapshotFromRenderer(base::Callback<void(const SkBitmap&)> callback,
@@ skipping 31 matching lines @@
   gfx::Size copy_size;
   copy_rect.Inset(0, 0, scrollbar_size, scrollbar_size);
 
   if (copy_rect.IsEmpty())
     return;
 
   context->clip_result = algorithm->GetCanvasCopyInfo(
       copy_rect.size(),
       ui::GetScaleFactorForNativeView(view->GetNativeView()),
       &copy_rect,
-      &copy_size);
+      &context->requested_copy_size);
 
   render_widget_host->CopyFromBackingStore(
       copy_rect,
-      copy_size,
+      context->requested_copy_size,
       base::Bind(&ProcessCapturedBitmap, context, algorithm));
 }
 
 }  // namespace
 
 ThumbnailTabHelper::ThumbnailTabHelper(content::WebContents* contents)
     : content::WebContentsObserver(contents),
       enabled_(true),
       load_interrupted_(false) {
   // Even though we deal in RenderWidgetHosts, we only care about its
@@ skipping 101 matching lines @@
         content::NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
         content::Source<RenderWidgetHost>(renderer));
   }
 }
 
 void ThumbnailTabHelper::WidgetHidden(RenderWidgetHost* widget) {
   if (!enabled_)
     return;
   UpdateThumbnailIfNecessary(web_contents());
 }
-