Plumb activation time to main

cc/trees/proxy_main.h

 // 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.
 
 #ifndef CC_TREES_PROXY_MAIN_H_
 #define CC_TREES_PROXY_MAIN_H_
 
 #include "base/macros.h"
 #include "cc/cc_export.h"
 #include "cc/input/browser_controls_state.h"
@@ skipping 43 matching lines @@
   CommitPipelineStage max_requested_pipeline_stage() const {
     return max_requested_pipeline_stage_;
   }
   CommitPipelineStage current_pipeline_stage() const {
     return current_pipeline_stage_;
   }
   CommitPipelineStage final_pipeline_stage() const {
     return final_pipeline_stage_;
   }
 
+  BeginFrameArgs BeginFrameArgsForTesting() {
+    return begin_frame_args_for_testing_;
+  }
+
  private:
   // Proxy implementation.
   bool IsStarted() const override;
   bool CommitToActiveTree() const override;
   void SetCompositorFrameSink(
       CompositorFrameSink* compositor_frame_sink) override;
   void SetVisible(bool visible) override;
   void SetNeedsAnimate() override;
   void SetNeedsUpdateLayers() override;
   void SetNeedsCommit() override;
@@ skipping 48 matching lines @@
 
   bool defer_commits_;
 
   // ProxyImpl is created and destroyed on the impl thread, and should only be
   // accessed on the impl thread.
   // It is safe to use base::Unretained to post tasks to ProxyImpl on the impl
   // thread, since we control its lifetime. Any tasks posted to it are bound to
   // run before we destroy it on the impl thread.
   std::unique_ptr<ProxyImpl> proxy_impl_;
 
+  BeginFrameArgs begin_frame_args_for_testing_;

[brianderson, 2017/04/13 22:36:37]

Can you store this in LayerTreeTest from an overridden BeginMainFrame() or
WillBeginMainFrame() instead?

[panicker, 2017/04/14 22:02:45]

Can you elaborate on what you mean exactly:
- Store it in LayerTreeHostClientForTesting in layer_tree_test 
- and Update WillBeginMainFrame to take args (lots of references)?
or something else ?

[panicker, 2017/04/17 21:54:50]

Addressed

+
   base::WeakPtrFactory<ProxyMain> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyMain);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROXY_MAIN_H_