Add argument to pass elastic overscroll delta to Blink (Chrome side)

cc/trees/layer_tree_host.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 1142 matching lines @@
     elastic_overscroll_ += info->elastic_overscroll_delta;
     if (!settings_.use_pinch_virtual_viewport) {
       client_->ApplyViewportDeltas(
           inner_viewport_scroll_delta + outer_viewport_scroll_delta,
           info->page_scale_delta,
           info->top_controls_delta);
     } else {
       // TODO(ccameron): pass the elastic overscroll here so that input events
       // may be translated appropriately.
       client_->ApplyViewportDeltas(
-          inner_viewport_scroll_delta,
-          outer_viewport_scroll_delta,
-          info->page_scale_delta,
+          inner_viewport_scroll_delta, outer_viewport_scroll_delta,
+          info->elastic_overscroll_delta, info->page_scale_delta,
           info->top_controls_delta);
     }
   }
 }
 
 void LayerTreeHost::StartRateLimiter() {
   if (inside_begin_main_frame_)
     return;
 
   if (!rate_limit_timer_.IsRunning()) {
@@ skipping 216 matching lines @@
     bool children_need_begin_frames) const {
   proxy_->SetChildrenNeedBeginFrames(children_need_begin_frames);
 }
 
 void LayerTreeHost::SendBeginFramesToChildren(
     const BeginFrameArgs& args) const {
   client_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc