cc: Add flag to disable future mask tiling.

cc/layers/picture_layer_impl_unittest.cc

 // 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.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 1130 matching lines @@
                                starting_animation_scale, animating_transform);
   EXPECT_BOTH_EQ(HighResTiling()->contents_scale(), contents_scale);
   EXPECT_EQ(active_layer()->LowResTiling()->contents_scale(),
             contents_scale * low_res_factor);
   EXPECT_FALSE(pending_layer()->LowResTiling());
   EXPECT_EQ(active_layer()->num_tilings(), 2u);
   EXPECT_EQ(pending_layer()->num_tilings(), 1u);
 
   // Mask layers dont create low res since they always fit on one tile.
   std::unique_ptr<FakePictureLayerImpl> mask =
-      FakePictureLayerImpl::CreateMaskWithRasterSource(
+      FakePictureLayerImpl::CreateSingleTextureMaskWithRasterSource(
           host_impl()->pending_tree(), 3, pending_raster_source);
   mask->SetBounds(layer_bounds);
   mask->SetDrawsContent(true);
   pending_layer()->test_properties()->SetMaskLayer(std::move(mask));
   pending_layer()->test_properties()->force_render_surface = true;
   RebuildPropertyTreesOnPendingTree();
   host_impl()->pending_tree()->UpdateDrawProperties(false);
 
   FakePictureLayerImpl* mask_raw = static_cast<FakePictureLayerImpl*>(
       pending_layer()->test_properties()->mask_layer);
@@ skipping 12 matching lines @@
 TEST_F(PictureLayerImplTest, HugeMasksGetScaledDown) {
   host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));
 
   gfx::Size layer_bounds(1000, 1000);
 
   scoped_refptr<FakeRasterSource> valid_raster_source =
       FakeRasterSource::CreateFilled(layer_bounds);
   SetupPendingTree(valid_raster_source);
 
   std::unique_ptr<FakePictureLayerImpl> mask_ptr =
-      FakePictureLayerImpl::CreateMaskWithRasterSource(
+      FakePictureLayerImpl::CreateSingleTextureMaskWithRasterSource(
           host_impl()->pending_tree(), 3, valid_raster_source);
   mask_ptr->SetBounds(layer_bounds);
   mask_ptr->SetDrawsContent(true);
   pending_layer()->test_properties()->SetMaskLayer(std::move(mask_ptr));
   pending_layer()->test_properties()->force_render_surface = true;
 
   RebuildPropertyTreesOnPendingTree();
   host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));
   bool update_lcd_text = false;
   host_impl()->pending_tree()->UpdateDrawProperties(update_lcd_text);
@@ skipping 108 matching lines @@
 
   gfx::Size layer_bounds(1000, 1000);
 
   SetInitialDeviceScaleFactor(1.3f);
 
   scoped_refptr<FakeRasterSource> valid_raster_source =
       FakeRasterSource::CreateFilled(layer_bounds);
   SetupPendingTree(valid_raster_source);
 
   std::unique_ptr<FakePictureLayerImpl> mask_ptr =
-      FakePictureLayerImpl::CreateMaskWithRasterSource(
+      FakePictureLayerImpl::CreateSingleTextureMaskWithRasterSource(
           host_impl()->pending_tree(), 3, valid_raster_source);
   mask_ptr->SetBounds(layer_bounds);
   mask_ptr->SetDrawsContent(true);
   pending_layer()->test_properties()->SetMaskLayer(std::move(mask_ptr));
   pending_layer()->test_properties()->force_render_surface = true;
 
   RebuildPropertyTreesOnPendingTree();
   host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));
   bool update_lcd_text = false;
   host_impl()->pending_tree()->UpdateDrawProperties(update_lcd_text);
@@ skipping 3619 matching lines @@
     EXPECT_FLOAT_EQ(expected_contents_scale,
                     pending_layer_ptr->picture_layer_tiling_set()
                         ->FindTilingWithResolution(HIGH_RESOLUTION)
                         ->contents_scale())
         << "ideal_contents_scale: " << ideal_contents_scale;
   }
 }
 
 }  // namespace
 }  // namespace cc