Add possibility to define data callback to BitmapFetcher

chrome/browser/image_holder.cc

Index: chrome/browser/image_holder.cc
diff --git a/chrome/browser/image_holder.cc b/chrome/browser/image_holder.cc
index 852f670d3594e691d4ab91d87b044921ba21e1f7..aeaec5ce4fd6daf2accdebc912747443a6cd7453 100644
--- a/chrome/browser/image_holder.cc
+++ b/chrome/browser/image_holder.cc
@@ -68,11 +68,12 @@ void ImageHolder::StartFetch() {
   // Now that we have queued them all, start the fetching.
   ScopedVector<chrome::BitmapFetcher>::iterator iter;
   for (iter = fetchers_.begin(); iter != fetchers_.end(); ++iter) {
-    (*iter)->Start(
+    (*iter)->Init(
         profile_->GetRequestContext(),
         std::string(),
         net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
         net::LOAD_NORMAL);
+    (*iter)->Start();
   }
 }