[cc] Pass on BeginFrameAcks from CompositorEBFS through RWHVAura, DFH.

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <tuple>
 
@@ skipping 1259 matching lines @@
 }
 
 // This tests that a compositor frame received with a stale content source ID
 // in its metadata is properly discarded.
 TEST_F(RenderWidgetHostTest, SwapCompositorFrameWithBadSourceId) {
   host_->StartNewContentRenderingTimeout(100);
   host_->OnFirstPaintAfterLoad();
 
   // First swap a frame with an invalid ID.
   cc::CompositorFrame frame;
+  frame.metadata.begin_frame_ack = cc::BeginFrameAck(0, 1, 1, 0, true);
   frame.metadata.content_source_id = 99;
   host_->OnMessageReceived(ViewHostMsg_SwapCompositorFrame(
       0, 0, frame, std::vector<IPC::Message>()));
   EXPECT_FALSE(
       static_cast<TestView*>(host_->GetView())->did_swap_compositor_frame());
   static_cast<TestView*>(host_->GetView())->reset_did_swap_compositor_frame();
 
   // Test with a valid content ID as a control.
   frame.metadata.content_source_id = 100;
   host_->OnMessageReceived(ViewHostMsg_SwapCompositorFrame(
@@ skipping 504 matching lines @@
                                       ui::LatencyInfo());
 
 
   // Tests RWHI::ForwardWheelEventWithLatencyInfo().
   SimulateWheelEventWithLatencyInfo(-5, 0, 0, true, ui::LatencyInfo());
 
   ASSERT_FALSE(host_->input_router()->HasPendingEvents());
 }
 
 }  // namespace content