cc: Split animating and drawing into separate actions

cc/scheduler/scheduler_state_machine.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_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 90 matching lines @@
            commit_state_ == COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED ||
            commit_state_ == COMMIT_STATE_READY_TO_COMMIT;
   }
   CommitState commit_state() const { return commit_state_; }
 
   bool RedrawPending() const { return needs_redraw_; }
   bool ManageTilesPending() const { return needs_manage_tiles_; }
 
   enum Action {
     ACTION_NONE,
+    ACTION_ANIMATE,
     ACTION_SEND_BEGIN_MAIN_FRAME,
     ACTION_COMMIT,
     ACTION_UPDATE_VISIBLE_TILES,
     ACTION_ACTIVATE_PENDING_TREE,
     ACTION_DRAW_AND_SWAP_IF_POSSIBLE,
     ACTION_DRAW_AND_SWAP_FORCED,
     ACTION_DRAW_AND_SWAP_ABORT,
     ACTION_DRAW_AND_READBACK,
     ACTION_BEGIN_OUTPUT_SURFACE_CREATION,
     ACTION_ACQUIRE_LAYER_TEXTURES_FOR_MAIN_THREAD,
@@ skipping 126 matching lines @@
 
   bool SupportsProactiveBeginImplFrame() const;
 
  protected:
   bool BeginImplFrameNeededToDraw() const;
   bool ProactiveBeginImplFrameWanted() const;
 
   // True if we need to force activations to make forward progress.
   bool PendingActivationsShouldBeForced() const;
 
+  bool ShouldAnimate() const;
   bool ShouldBeginOutputSurfaceCreation() const;
   bool ShouldDrawForced() const;
   bool ShouldDraw() const;
   bool ShouldActivatePendingTree() const;
   bool ShouldAcquireLayerTexturesForMainThread() const;
   bool ShouldUpdateVisibleTiles() const;
   bool ShouldSendBeginMainFrame() const;
   bool ShouldCommit() const;
   bool ShouldManageTiles() const;
 
@@ skipping 14 matching lines @@
   BeginImplFrameState begin_impl_frame_state_;
   CommitState commit_state_;
   TextureState texture_state_;
   ForcedRedrawOnTimeoutState forced_redraw_state_;
   SynchronousReadbackState readback_state_;
 
   BeginFrameArgs last_begin_impl_frame_args_;
 
   int commit_count_;
   int current_frame_number_;
+  int last_frame_number_animate_performed_;
   int last_frame_number_swap_performed_;
   int last_frame_number_begin_main_frame_sent_;
   int last_frame_number_update_visible_tiles_was_called_;
 
   // manage_tiles_funnel_ is "filled" each time ManageTiles is called
   // and "drained" on each BeginImplFrame. If the funnel gets too full,
   // we start throttling ACTION_MANAGE_TILES such that we average one
   // ManageTile per BeginImplFrame.
   int manage_tiles_funnel_;
   int consecutive_checkerboard_animations_;
@@ skipping 15 matching lines @@
   bool skip_next_begin_main_frame_to_reduce_latency_;
   bool skip_begin_main_frame_to_reduce_latency_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_