cc: Stop using magic numbers to detect if we can use partial updates.

cc/layers/tiled_layer_unittest.cc

 // 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.
 
 #include "cc/layers/tiled_layer.h"
 
 #include <limits>
 #include <vector>
 
 #include "cc/debug/overdraw_metrics.h"
@@ skipping 32 matching lines @@
     stack_.back().occlusion_from_inside_target = occlusion;
   }
 };
 
 class TiledLayerTest : public testing::Test {
  public:
   TiledLayerTest()
       : proxy_(NULL),
         output_surface_(FakeOutputSurface::Create3d()),
         queue_(make_scoped_ptr(new ResourceUpdateQueue)),
-        fake_layer_impl_tree_host_client_(FakeLayerTreeHostClient::DIRECT_3D),
+        impl_thread_("ImplThread"),
+        fake_layer_tree_host_client_(FakeLayerTreeHostClient::DIRECT_3D),
         occlusion_(NULL) {
     settings_.max_partial_texture_updates = std::numeric_limits<size_t>::max();
     settings_.layer_transforms_should_scale_layer_contents = true;
   }
 
   virtual void SetUp() {
-    layer_tree_host_ = LayerTreeHost::Create(&fake_layer_impl_tree_host_client_,
+    impl_thread_.Start();
+    layer_tree_host_ = LayerTreeHost::Create(&fake_layer_tree_host_client_,
                                              settings_,
-                                             NULL);
+                                             impl_thread_.message_loop_proxy());
     proxy_ = layer_tree_host_->proxy();
     resource_manager_ = PrioritizedResourceManager::Create(proxy_);
+    layer_tree_host_->SetLayerTreeHostClientReady();
     layer_tree_host_->InitializeOutputSurfaceIfNeeded();
     layer_tree_host_->SetRootLayer(Layer::Create());
 
     CHECK(output_surface_->BindToClient(&output_surface_client_));
 
     DebugScopedSetImplThreadAndMainThreadBlocked
         impl_thread_and_main_thread_blocked(proxy_);
     resource_provider_ =
         ResourceProvider::Create(output_surface_.get(), 0, false);
     host_impl_ = make_scoped_ptr(new FakeLayerTreeHostImpl(proxy_));
@@ skipping 110 matching lines @@
   }
 
  public:
   Proxy* proxy_;
   LayerTreeSettings settings_;
   FakeOutputSurfaceClient output_surface_client_;
   scoped_ptr<OutputSurface> output_surface_;
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<ResourceUpdateQueue> queue_;
   PriorityCalculator priority_calculator_;
-  FakeLayerTreeHostClient fake_layer_impl_tree_host_client_;
+  base::Thread impl_thread_;
+  FakeLayerTreeHostClient fake_layer_tree_host_client_;
   scoped_ptr<LayerTreeHost> layer_tree_host_;
   scoped_ptr<FakeLayerTreeHostImpl> host_impl_;
   scoped_ptr<PrioritizedResourceManager> resource_manager_;
   TestOcclusionTracker* occlusion_;
 };
 
 TEST_F(TiledLayerTest, PushDirtyTiles) {
   scoped_refptr<FakeTiledLayer> layer =
       make_scoped_refptr(new FakeTiledLayer(resource_manager_.get()));
   scoped_ptr<FakeTiledLayerImpl> layer_impl =
@@ skipping 1735 matching lines @@
   // Invalidate the entire layer in layer space. When painting, the rect given
   // to webkit should match the layer's bounds.
   layer->SetNeedsDisplayRect(layer_rect);
   layer->Update(queue_.get(), NULL);
 
   EXPECT_RECT_EQ(layer_rect, layer->tracking_layer_painter()->PaintedRect());
 }
 
 }  // namespace
 }  // namespace cc