Rewire Android WebView's compositor changed signal.

content/browser/renderer_host/render_widget_host_view_android.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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 1122 matching lines @@
                    weak_ptr_factory_.GetWeakPtr(),
                    last_frame_info_->output_surface_id);
 
     ack_callbacks_.push(ack_callback);
   }
 
   last_frame_info_.reset(
       new LastFrameInfo(output_surface_id, std::move(frame)));
 }
 
-SynchronousCompositorHost*
-RenderWidgetHostViewAndroid::GetSynchronousCompositor() {
-  return sync_compositor_.get();
-}
-
 void RenderWidgetHostViewAndroid::SynchronousFrameMetadata(
     const cc::CompositorFrameMetadata& frame_metadata) {
   if (!content_view_core_)
     return;
 
   // This is a subset of OnSwapCompositorFrame() used in the synchronous
   // compositor flow.
   OnFrameMetadataUpdated(frame_metadata);
 
   // DevTools ScreenCast support for Android WebView.
@@ skipping 629 matching lines @@
 
   if (!overscroll_controller_ &&
       content_view_core_->GetWindowAndroid()->GetCompositor()) {
     overscroll_controller_ = CreateOverscrollController(content_view_core_);
   }
 
   if (!sync_compositor_) {
     sync_compositor_ = SynchronousCompositorHost::Create(
         this, content_view_core_->GetWebContents());
   }
-  if (sync_compositor_)
-    sync_compositor_->DidBecomeCurrent();
 }
 
 void RenderWidgetHostViewAndroid::RunAckCallbacks(
     cc::SurfaceDrawStatus status) {
   while (!ack_callbacks_.empty()) {
     ack_callbacks_.front().Run();
     ack_callbacks_.pop();
   }
 }
 
@@ skipping 237 matching lines @@
     case ui::MotionEvent::ACTION_UP:
     case ui::MotionEvent::ACTION_POINTER_UP:
       UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.OS.TOUCH_RELEASED",
                                   delta.InMicroseconds(), 1, 1000000, 50);
     default:
       return;
   }
 }
 
 }  // namespace content