cc: Make animations tick regardless of drawing.

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 126 matching lines @@
   // as a commit is already still in flight.
   void SetHasPendingTree(bool has_pending_tree);
   bool has_pending_tree() const { return has_pending_tree_; }
 
   void DidLoseOutputSurface();
   void DidRecreateOutputSurface();
 
   // Exposed for testing purposes.
   void SetMaximumNumberOfFailedDrawsBeforeDrawIsForced(int num_draws);
 
+  // False if drawing is not being prevented, true if drawing won't happen
+  // for some reason, such as not being visible.
+  bool DrawSuspendedUntilCommit() const;
+
   std::string ToString();
 
  protected:
   bool ShouldDrawForced() const;
-  bool DrawSuspendedUntilCommit() const;
   bool ScheduledToDraw() const;
   bool ShouldDraw() const;
   bool ShouldAttemptTreeActivation() const;
   bool ShouldAcquireLayerTexturesForMainThread() const;
   bool ShouldCheckForCompletedTileUploads() const;
   bool HasDrawnThisFrame() const;
   bool HasAttemptedTreeActivationThisFrame() const;
   bool HasCheckedForCompletedTileUploadsThisFrame() const;
 
   const SchedulerSettings settings_;
@@ skipping 22 matching lines @@
   bool draw_if_possible_failed_;
   TextureState texture_state_;
   OutputSurfaceState output_surface_state_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_