[cc] Fix CompositorFrameSinkSupport BeginFrameAck interface.

content/browser/frame_host/render_widget_host_view_child_frame_unittest.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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 113 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewChildFrameTest);
 };
 
 cc::CompositorFrame CreateDelegatedFrame(float scale_factor,
                                          gfx::Size size,
                                          const gfx::Rect& damage) {
   cc::CompositorFrame frame;
   frame.metadata.device_scale_factor = scale_factor;
+  frame.metadata.begin_frame_ack = cc::BeginFrameAck(0, 1, 1, 0, true);
 
   std::unique_ptr<cc::RenderPass> pass = cc::RenderPass::Create();
   pass->SetNew(1, gfx::Rect(size), damage, gfx::Transform());
   frame.render_pass_list.push_back(std::move(pass));
   return frame;
 }
 
 // http://crbug.com/696919
 #if defined(OS_WIN)
 #define MAYBE_VisibilityTest DISABLED_VisibilityTest
@@ skipping 70 matching lines @@
 
   // Submit another frame. Since it has the same size and scale as the first
   // one, the same surface id must be used. has_frame() must return true.
   view_->OnSwapCompositorFrame(
       0, CreateDelegatedFrame(scale_factor, view_size, view_rect));
   EXPECT_EQ(surface_id, GetSurfaceId());
   EXPECT_TRUE(view_->has_frame());
 }
 
 }  // namespace content