Plumb smooth scrolling in Chromium compositor

content/browser/android/in_process/synchronous_compositor_impl.cc

 // Copyright 2013 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 "content/browser/android/in_process/synchronous_compositor_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 335 matching lines @@
   DCHECK(CalledOnValidThread());
   DCHECK(compositor_client_);
   if (!registered_with_client_)
     return gfx::ScrollOffset();
   // TODO(miletus): Make GetTotalRootLayerScrollOffset return
   // ScrollOffset. crbug.com/414283.
   return gfx::ScrollOffset(
       compositor_client_->GetTotalRootLayerScrollOffset());
 }
 
-bool SynchronousCompositorImpl::IsExternalScrollActive() const {
-  DCHECK(CalledOnValidThread());
-  DCHECK(compositor_client_);
-  if (!registered_with_client_)
-    return false;
-  return compositor_client_->IsExternalScrollActive();
-}
-
 void SynchronousCompositorImpl::SetNeedsAnimate(
     const AnimationCallback& animation) {
   DCHECK(CalledOnValidThread());
   DCHECK(compositor_client_);
   if (!registered_with_client_)
     return;
   compositor_client_->SetNeedsAnimateScroll(animation);
 }
 
 void SynchronousCompositorImpl::UpdateRootLayerState(
@@ skipping 33 matching lines @@
     g_factory.Get();  // Ensure it's initialized.
     SynchronousCompositorImpl::CreateForWebContents(contents);
   }
   SynchronousCompositorImpl* instance =
       SynchronousCompositorImpl::FromWebContents(contents);
   DCHECK(instance);
   instance->SetClient(client);
 }
 
 }  // namespace content