Plumb smooth scrolling in Chromium compositor

android_webview/browser/browser_view_renderer.cc

 // Copyright 2014 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 "android_webview/browser/browser_view_renderer.h"
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/child_frame.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 542 matching lines @@
   DCHECK_LE(scroll_offset.x(), max_offset.x());
   DCHECK_LE(scroll_offset.y(), max_offset.y());
 
   client_->ScrollContainerViewTo(scroll_offset);
 }
 
 gfx::Vector2dF BrowserViewRenderer::GetTotalRootLayerScrollOffset() {
   return scroll_offset_dip_;
 }
 
-bool BrowserViewRenderer::IsExternalScrollActive() const {
-  return client_->IsSmoothScrollingActive();
-}
-
 void BrowserViewRenderer::UpdateRootLayerState(
     const gfx::Vector2dF& total_scroll_offset_dip,
     const gfx::Vector2dF& max_scroll_offset_dip,
     const gfx::SizeF& scrollable_size_dip,
     float page_scale_factor,
     float min_page_scale_factor,
     float max_page_scale_factor) {
   TRACE_EVENT_INSTANT1(
       "android_webview",
       "BrowserViewRenderer::UpdateRootLayerState",
@@ skipping 171 matching lines @@
   base::StringAppendF(&str,
                       "overscroll_rounding_error_: %s ",
                       overscroll_rounding_error_.ToString().c_str());
   base::StringAppendF(
       &str, "on_new_picture_enable: %d ", on_new_picture_enable_);
   base::StringAppendF(&str, "clear_view: %d ", clear_view_);
   return str;
 }
 
 }  // namespace android_webview