cc: Make low res tilings off by default in LayerTreeSettings.

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 <algorithm>
 #include <limits>
 #include <set>
 #include <utility>
@@ skipping 28 matching lines @@
   explicit MockCanvas(int w, int h) : SkCanvas(w, h) {}
 
   virtual void drawRect(const SkRect& rect, const SkPaint& paint) OVERRIDE {
     // Capture calls before SkCanvas quickReject() kicks in.
     rects_.push_back(rect);
   }
 
   std::vector<SkRect> rects_;
 };
 
+class NoLowResTilingsSettings : public ImplSidePaintingSettings {};
+
+class LowResTilingsSettings : public ImplSidePaintingSettings {
+ public:
+  LowResTilingsSettings() { create_low_res_tiling = true; }
+};
+
 class PictureLayerImplTest : public testing::Test {
  public:
   PictureLayerImplTest()
       : proxy_(base::MessageLoopProxy::current()),
-        host_impl_(ImplSidePaintingSettings(),
-                   &proxy_,
-                   &shared_bitmap_manager_),
+        host_impl_(LowResTilingsSettings(), &proxy_, &shared_bitmap_manager_),
         id_(7),
         pending_layer_(NULL),
         old_pending_layer_(NULL),
         active_layer_(NULL) {}
 
   explicit PictureLayerImplTest(const LayerTreeSettings& settings)
       : proxy_(base::MessageLoopProxy::current()),
         host_impl_(settings, &proxy_, &shared_bitmap_manager_),
         id_(7) {}
 
@@ skipping 2919 matching lines @@
   pending_layer_->MarkVisibleResourcesAsRequired();
 
   // The unshared high-res tiles are not ready, so we cannot activate.
   EXPECT_FALSE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
 
   // When the unshared pending high-res tiles are ready, we can activate.
   pending_layer_->SetAllTilesReadyInTiling(pending_layer_->HighResTiling());
   EXPECT_TRUE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
 }
 
-class NoLowResTilingsSettings : public ImplSidePaintingSettings {
- public:
-  NoLowResTilingsSettings() { create_low_res_tiling = false; }
-};
-
 class NoLowResPictureLayerImplTest : public PictureLayerImplTest {
  public:
   NoLowResPictureLayerImplTest()
       : PictureLayerImplTest(NoLowResTilingsSettings()) {}
 };
 
 TEST_F(NoLowResPictureLayerImplTest, ManageTilingsCreatesTilings) {
   gfx::Size tile_size(400, 400);
   gfx::Size layer_bounds(1300, 1900);
 
@@ skipping 565 matching lines @@
 
   // Even when OOM, quads should be produced, and should be different material
   // from quads with resource.
   EXPECT_LT(max_tiles, render_pass->quad_list.size());
   EXPECT_EQ(DrawQuad::Material::TILED_CONTENT,
             render_pass->quad_list.front()->material);
   EXPECT_EQ(DrawQuad::Material::SOLID_COLOR,
             render_pass->quad_list.back()->material);
 }
 
-class OcclusionTrackingSettings : public ImplSidePaintingSettings {
+class OcclusionTrackingSettings : public LowResTilingsSettings {
  public:
   OcclusionTrackingSettings() { use_occlusion_for_tile_prioritization = true; }
 };
 
 class OcclusionTrackingPictureLayerImplTest : public PictureLayerImplTest {
  public:
   OcclusionTrackingPictureLayerImplTest()
       : PictureLayerImplTest(OcclusionTrackingSettings()) {}
 
   void VerifyEvictionConsidersOcclusion(
@@ skipping 621 matching lines @@
   ActivateTree();
   EXPECT_TRUE(active_layer_->GetRecycledTwinLayer());
   EXPECT_EQ(old_pending_layer_, active_layer_->GetRecycledTwinLayer());
 
   host_impl_.ResetRecycleTreeForTesting();
   EXPECT_FALSE(active_layer_->GetRecycledTwinLayer());
 }
 
 }  // namespace
 }  // namespace cc