sync compositor: Implement post metadata to UI

content/browser/android/synchronous_compositor_host.cc

 // Copyright 2015 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/android/synchronous_compositor_host.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
@@ skipping 64 matching lines @@
       bytes_limit_(0u),
       renderer_param_version_(0u),
       need_animate_scroll_(false),
       need_invalidate_count_(0u),
       did_activate_pending_tree_count_(0u) {
   client_->DidInitializeCompositor(this, process_id_, routing_id_);
 }
 
 SynchronousCompositorHost::~SynchronousCompositorHost() {
   client_->DidDestroyCompositor(this, process_id_, routing_id_);
+  if (registered_with_filter_) {
+    if (SynchronousCompositorBrowserFilter* filter = GetFilter())
+      filter->UnregisterHost(this);
+  }
 }
 
 bool SynchronousCompositorHost::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SynchronousCompositorHost, message)
     IPC_MESSAGE_HANDLER(SyncCompositorHostMsg_CompositorFrameSinkCreated,
                         CompositorFrameSinkCreated)
     IPC_MESSAGE_HANDLER(SyncCompositorHostMsg_UpdateState, ProcessCommonParams)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 scoped_refptr<SynchronousCompositor::FrameFuture>
 SynchronousCompositorHost::DemandDrawHwAsync(
     const gfx::Size& viewport_size,
     const gfx::Rect& viewport_rect_for_tile_priority,
     const gfx::Transform& transform_for_tile_priority) {
   SyncCompositorDemandDrawHwParams params(viewport_size,
                                           viewport_rect_for_tile_priority,
                                           transform_for_tile_priority);
   scoped_refptr<FrameFuture> frame_future = new FrameFuture();
   if (SynchronousCompositorBrowserFilter* filter = GetFilter()) {
+    if (!registered_with_filter_) {
+      filter->RegisterHost(this);
+      registered_with_filter_ = true;
+    }
     filter->SetFrameFuture(routing_id_, frame_future);
     sender_->Send(new SyncCompositorMsg_DemandDrawHwAsync(routing_id_, params));
   } else {
     frame_future->SetFrame(nullptr);
   }
   return frame_future;
 }
 
 SynchronousCompositor::Frame SynchronousCompositorHost::DemandDrawHw(
     const gfx::Size& viewport_size,
     const gfx::Rect& viewport_rect_for_tile_priority,
     const gfx::Transform& transform_for_tile_priority) {
   SyncCompositorDemandDrawHwParams params(viewport_size,
                                           viewport_rect_for_tile_priority,
                                           transform_for_tile_priority);
   uint32_t compositor_frame_sink_id;
   cc::CompositorFrame compositor_frame;
   SyncCompositorCommonRendererParams common_renderer_params;
 
   if (!sender_->Send(new SyncCompositorMsg_DemandDrawHw(
           routing_id_, params, &common_renderer_params,
           &compositor_frame_sink_id, &compositor_frame))) {
     return SynchronousCompositor::Frame();
   }
 
   ProcessCommonParams(common_renderer_params);
 
-  return ProcessHardwareFrame(compositor_frame_sink_id,
-                              std::move(compositor_frame));
-}
-
-SynchronousCompositor::Frame SynchronousCompositorHost::ProcessHardwareFrame(
-    uint32_t compositor_frame_sink_id,
-    cc::CompositorFrame compositor_frame) {
   SynchronousCompositor::Frame frame;
   frame.frame.reset(new cc::CompositorFrame);
   frame.compositor_frame_sink_id = compositor_frame_sink_id;
   *frame.frame = std::move(compositor_frame);
   if (!frame.frame->delegated_frame_data) {
     // This can happen if compositor did not swap in this draw.
     frame.frame.reset();
   }
   if (frame.frame) {
     UpdateFrameMetaData(frame.frame->metadata.Clone());
@@ skipping 263 matching lines @@
   if (params.page_scale_factor) {
     client_->UpdateRootLayerState(
         this, gfx::ScrollOffsetToVector2dF(params.total_scroll_offset),
         gfx::ScrollOffsetToVector2dF(params.max_scroll_offset),
         params.scrollable_size, params.page_scale_factor,
         params.min_page_scale_factor, params.max_page_scale_factor);
   }
 }
 
 }  // namespace content