cc: Don't make tiles for mask layers that are too big for a texture.

cc/layers/picture_layer_impl.h

 // Copyright 2012 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_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 117 matching lines @@
   virtual PictureLayerTiling* GetRecycledTwinTiling(
       const PictureLayerTiling* tiling) OVERRIDE;
   virtual size_t GetMaxTilesForInterestArea() const OVERRIDE;
   virtual float GetSkewportTargetTimeInSeconds() const OVERRIDE;
   virtual int GetSkewportExtrapolationLimitInContentPixels() const OVERRIDE;
   virtual WhichTree GetTree() const OVERRIDE;
 
   // PushPropertiesTo active tree => pending tree.
   void SyncTiling(const PictureLayerTiling* tiling);
 
-  // Mask-related functions
-  void SetIsMask(bool is_mask);
+  // Mask-related functions.
   virtual ResourceProvider::ResourceId ContentsResourceId() const OVERRIDE;
 
   virtual size_t GPUMemoryUsageInBytes() const OVERRIDE;
 
   virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE;
 
   // Functions used by tile manager.
   PictureLayerImpl* GetTwinLayer() { return twin_layer_; }
   bool IsOnActiveOrPendingTree() const;
   // Virtual for testing.
@@ skipping 48 matching lines @@
 
   virtual void UpdateIdealScales();
   float MaximumTilingContentsScale() const;
 
   PictureLayerImpl* twin_layer_;
 
   scoped_ptr<PictureLayerTilingSet> tilings_;
   scoped_refptr<PicturePileImpl> pile_;
   Region invalidation_;
 
-  bool is_mask_;
-
   float ideal_page_scale_;
   float ideal_device_scale_;
   float ideal_source_scale_;
   float ideal_contents_scale_;
 
   float raster_page_scale_;
   float raster_device_scale_;
   float raster_source_scale_;
   float raster_contents_scale_;
   float low_res_raster_contents_scale_;
@@ skipping 11 matching lines @@
   gfx::Rect viewport_rect_for_tile_priority_;
   gfx::Transform screen_space_transform_for_tile_priority_;
 
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_