cc: Move gpu rasterization flag from tree-impl to tree-host-impl.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index e96bda652331beec3aa3db7bcc2743f494624039..802b854ca792b6224641e81ee99a9361ab458436 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -5731,7 +5731,7 @@ TEST_F(LayerTreeHostImplTest, MemoryPolicy) {
   settings.gpu_rasterization_enabled = true;
   host_impl_ = LayerTreeHostImpl::Create(
       settings, this, &proxy_, &stats_instrumentation_, NULL, 0);
-  host_impl_->active_tree()->SetUseGpuRasterization(true);
+  host_impl_->SetUseGpuRasterization(true);
   host_impl_->SetVisible(true);
   host_impl_->SetMemoryPolicy(policy1);
   EXPECT_EQ(policy1.bytes_limit_when_visible, current_limit_bytes_);
@@ -5761,6 +5761,26 @@ TEST_F(LayerTreeHostImplTest, RequireHighResWhenVisible) {
   EXPECT_TRUE(host_impl_->active_tree()->RequiresHighResToDraw());
 }
 
+TEST_F(LayerTreeHostImplTest, RequireHighResAfterGpuRasterizationToggles) {
+  ASSERT_TRUE(host_impl_->active_tree());
+  EXPECT_FALSE(host_impl_->use_gpu_rasterization());
+
+  EXPECT_FALSE(host_impl_->active_tree()->RequiresHighResToDraw());
+  host_impl_->SetUseGpuRasterization(false);
+  EXPECT_FALSE(host_impl_->active_tree()->RequiresHighResToDraw());
+  host_impl_->SetUseGpuRasterization(true);
+  EXPECT_TRUE(host_impl_->active_tree()->RequiresHighResToDraw());
+  host_impl_->SetUseGpuRasterization(false);
+  EXPECT_TRUE(host_impl_->active_tree()->RequiresHighResToDraw());
+
+  host_impl_->CreatePendingTree();
+  host_impl_->ActivatePendingTree();
+
+  EXPECT_FALSE(host_impl_->active_tree()->RequiresHighResToDraw());
+  host_impl_->SetUseGpuRasterization(true);
+  EXPECT_TRUE(host_impl_->active_tree()->RequiresHighResToDraw());
+}
+
 class LayerTreeHostImplTestManageTiles : public LayerTreeHostImplTest {
  public:
   virtual void SetUp() OVERRIDE {