2 files changed, 9 insertions, 7 deletions
diff --git a/chrome/browser/tab_contents/thumbnail_generator.cc b/chrome/browser/tab_contents/thumbnail_generator.cc
index 1f431ba..f7c16ba 100644
--- a/chrome/browser/tab_contents/thumbnail_generator.cc
+++ b/chrome/browser/tab_contents/thumbnail_generator.cc
@@ -130,7 +130,7 @@ SkBitmap GetBitmapForBackingStore(
 }  // namespace
 
 struct ThumbnailGenerator::AsyncRequestInfo {
-  ThumbnailReadyCallback callback;
+  scoped_ptr<ThumbnailReadyCallback> callback;
   scoped_ptr<TransportDIB> thumbnail_dib;
   RenderWidgetHost* renderer;  // Not owned.
 };
@@ -195,9 +195,11 @@ void ThumbnailGenerator::MonitorRenderer(RenderWidgetHost* renderer,
 
 void ThumbnailGenerator::AskForSnapshot(RenderWidgetHost* renderer,
                                         bool prefer_backing_store,
-                                        const ThumbnailReadyCallback& callback,
+                                        ThumbnailReadyCallback* callback,
                                         gfx::Size page_size,
                                         gfx::Size desired_size) {
+  scoped_ptr<ThumbnailReadyCallback> callback_deleter(callback);
+
   if (prefer_backing_store) {
     BackingStore* backing_store = renderer->GetBackingStore(false);
     if (backing_store) {
@@ -208,7 +210,7 @@ void ThumbnailGenerator::AskForSnapshot(RenderWidgetHost* renderer,
                                                     desired_size.height(),
                                                     kNoOptions,
                                                     NULL);
-      callback.Run(first_try);
+      callback->Run(first_try);
 
       return;
     }
@@ -247,7 +249,7 @@ void ThumbnailGenerator::AskForSnapshot(RenderWidgetHost* renderer,
 #endif
 
   linked_ptr<AsyncRequestInfo> request_info(new AsyncRequestInfo);
-  request_info->callback = callback;
+  request_info->callback.reset(callback_deleter.release());
   request_info->thumbnail_dib.reset(thumbnail_dib.release());
   request_info->renderer = renderer;
   ThumbnailCallbackMap::value_type new_value(sequence_num, request_info);
@@ -316,7 +318,7 @@ void ThumbnailGenerator::WidgetDidReceivePaintAtSizeAck(
     // TODO: Figure out a way to avoid this copy?
     non_owned_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config);
 
-    item->second->callback.Run(result);
+    item->second->callback->Run(result);
 
     // We're done with the callback, and with the DIB, so delete both.
     callback_map_.erase(item);
diff --git a/chrome/browser/tab_contents/thumbnail_generator.h b/chrome/browser/tab_contents/thumbnail_generator.h
index 8329f29..0c0e588 100644
--- a/chrome/browser/tab_contents/thumbnail_generator.h
+++ b/chrome/browser/tab_contents/thumbnail_generator.h
@@ -32,7 +32,7 @@ class TopSites;
 class ThumbnailGenerator : public NotificationObserver,
                            public TabContentsObserver {
  public:
-  typedef base::Callback<void(const SkBitmap&)> ThumbnailReadyCallback;
+  typedef Callback1<const SkBitmap&>::Type ThumbnailReadyCallback;
   // The result of clipping. This can be used to determine if the
   // generated thumbnail is good or not.
   enum ClipResult {
@@ -80,7 +80,7 @@ class ThumbnailGenerator : public NotificationObserver,
   // dimensions, but might not be the exact size requested.
   void AskForSnapshot(RenderWidgetHost* renderer,
                       bool prefer_backing_store,
-                      const ThumbnailReadyCallback& callback,
+                      ThumbnailReadyCallback* callback,
                       gfx::Size page_size,
                       gfx::Size desired_size);