cc: Adding BeginFrameTracker object and removing Now() from LTHI.

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 #include "cc/input/top_controls_manager_client.h"
 #include "cc/layers/layer_lists.h"
 #include "cc/layers/render_pass_sink.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/renderer.h"
 #include "cc/quads/render_pass.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/ui_resource_client.h"
+#include "cc/scheduler/begin_frame_tracker.h"
 #include "cc/scheduler/commit_earlyout_reason.h"
 #include "cc/scheduler/draw_result.h"
 #include "cc/scheduler/video_frame_controller.h"
 #include "cc/tiles/tile_manager.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "cc/trees/proxy.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ skipping 399 matching lines @@
 
   gfx::Vector2dF accumulated_root_overscroll() const {
     return accumulated_root_overscroll_;
   }
 
   bool pinch_gesture_active() const { return pinch_gesture_active_; }
 
   void SetTreePriority(TreePriority priority);
   TreePriority GetTreePriority() const;
 
+  // TODO(mithro): Remove this methods which exposes the internal
+  // BeginFrameArgs to external callers.
   virtual BeginFrameArgs CurrentBeginFrameArgs() const;
 
   // Expected time between two begin impl frame calls.
-  base::TimeDelta begin_impl_frame_interval() const {
-    return begin_impl_frame_interval_;
-  }
+  base::TimeDelta CurrentBeginFrameInterval() const;
 
   void AsValueWithFrameInto(FrameData* frame,
                             base::trace_event::TracedValue* value) const;
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValueWithFrame(
       FrameData* frame) const;
   void ActivationStateAsValueInto(base::trace_event::TracedValue* value) const;
 
   bool page_scale_animation_active() const { return !!page_scale_animation_; }
 
   virtual void CreateUIResource(UIResourceId uid,
@@ skipping 84 matching lines @@
   bool is_likely_to_require_a_draw() const {
     return is_likely_to_require_a_draw_;
   }
 
   // Removes empty or orphan RenderPasses from the frame.
   static void RemoveRenderPasses(FrameData* frame);
 
   LayerTreeHostImplClient* client_;
   Proxy* proxy_;
 
+  BeginFrameTracker current_begin_frame_tracker_;
+
  private:
   gfx::Vector2dF ScrollLayerWithViewportSpaceDelta(
       LayerImpl* layer_impl,
       const gfx::PointF& viewport_point,
       const gfx::Vector2dF& viewport_delta);
 
   void CreateAndSetRenderer();
   void CreateAndSetTileManager();
   void DestroyTileManager();
   void ReleaseTreeResources();
@@ skipping 155 matching lines @@
   // - viewport_rect_for_tile_priority_ is the rect in view space used for
   // tiling priority.
   gfx::Transform external_transform_;
   gfx::Rect external_viewport_;
   gfx::Rect external_clip_;
   gfx::Rect viewport_rect_for_tile_priority_;
   bool resourceless_software_draw_;
 
   gfx::Rect viewport_damage_rect_;
 
-  BeginFrameArgs current_begin_frame_args_;
-
-  // Expected time between two begin impl frame calls.
-  base::TimeDelta begin_impl_frame_interval_;
-
   scoped_ptr<AnimationRegistrar> animation_registrar_;
   std::set<ScrollbarAnimationController*> scrollbar_animation_controllers_;
   std::set<VideoFrameController*> video_frame_controllers_;
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
   MicroBenchmarkControllerImpl micro_benchmark_controller_;
   scoped_ptr<TaskGraphRunner> single_thread_synchronous_task_graph_runner_;
 
   // Optional callback to notify of new tree activations.
   base::Closure tree_activation_callback_;
@@ skipping 11 matching lines @@
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   scoped_ptr<Viewport> viewport_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_