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

cc/resources/picture_pile_base.h

 // Copyright 2013 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_RESOURCES_PICTURE_PILE_BASE_H_
 #define CC_RESOURCES_PICTURE_PILE_BASE_H_
 
 #include <bitset>
 #include <list>
 #include <utility>
@@ skipping 33 matching lines @@
   gfx::Rect tile_bounds(int x, int y) const { return tiling_.TileBounds(x, y); }
   bool HasRecordingAt(int x, int y);
   bool CanRaster(float contents_scale, const gfx::Rect& content_rect);
 
   // If this pile contains any valid recordings. May have false positives.
   bool HasRecordings() const { return has_any_recordings_; }
 
   // If this pile has ever contained any recordings with text.
   bool has_text() const { return has_text_; }
 
+  void set_is_mask(bool is_mask) { is_mask_ = is_mask; }
+  bool is_mask() const { return is_mask_; }
+
   static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
                                   SkTileGridFactory::TileGridInfo* info);
 
   void SetTileGridSize(const gfx::Size& tile_grid_size);
   TilingData& tiling() { return tiling_; }
 
   void AsValueInto(base::debug::TracedValue* array) const;
 
  protected:
   class CC_EXPORT PictureInfo {
@@ skipping 48 matching lines @@
   SkColor background_color_;
   int slow_down_raster_scale_factor_for_debug_;
   bool contents_opaque_;
   bool contents_fill_bounds_completely_;
   bool show_debug_picture_borders_;
   bool clear_canvas_with_debug_color_;
   // A hint about whether there are any recordings. This may be a false
   // positive.
   bool has_any_recordings_;
   bool has_text_;
+  bool is_mask_;
 
  private:
   void SetBufferPixels(int buffer_pixels);
 
   friend class base::RefCounted<PicturePileBase>;
   DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_