cc: Fix hit-testing in zero-opacity layers.

cc/trees/layer_tree_host_unittest_picture.cc

Index: cc/trees/layer_tree_host_unittest_picture.cc
diff --git a/cc/trees/layer_tree_host_unittest_picture.cc b/cc/trees/layer_tree_host_unittest_picture.cc
index 731f69214afcfc462f2c4a65c3cae4d110962c58..f290989915eaec78f821a15c7243bd95619b2f59 100644
--- a/cc/trees/layer_tree_host_unittest_picture.cc
+++ b/cc/trees/layer_tree_host_unittest_picture.cc
@@ -4,7 +4,10 @@
 
 #include "cc/trees/layer_tree_host.h"
 
+#include "cc/layers/solid_color_layer.h"
+#include "cc/test/fake_content_layer.h"
 #include "cc/test/fake_content_layer_client.h"
+#include "cc/test/fake_content_layer_impl.h"
 #include "cc/test/fake_picture_layer.h"
 #include "cc/test/fake_picture_layer_impl.h"
 #include "cc/test/layer_tree_test.h"
@@ -115,5 +118,76 @@ class LayerTreeHostPictureTestTwinLayer
 
 MULTI_THREAD_TEST_F(LayerTreeHostPictureTestTwinLayer);
 
+class LayerTreeHostPictureNoUpdateTileProprityForZeroOpacityLayer
+    : public LayerTreeHostPictureTest {
+ protected:
+  virtual void SetupTree() OVERRIDE {
+    parent_layer_ = FakeContentLayer::Create(&parent_client_);
+    parent_layer_->SetBounds(gfx::Size(40, 40));
+    parent_layer_->SetOpacity(0.f);
+    parent_layer_->SetIsDrawable(true);
+
+    scoped_refptr<Layer> root = SolidColorLayer::Create();
+    root->SetBounds(gfx::Size(60, 60));
+    root->SetOpacity(1.f);
+    root->SetIsDrawable(true);
+    root->AddChild(parent_layer_);
+    layer_tree_host()->SetRootLayer(root);
+
+    wheel_handler_ = FakeContentLayer::Create(NULL);
+    wheel_handler_->SetBounds(gfx::Size(10, 10));
+    wheel_handler_->SetHaveWheelEventHandlers(true);
+    wheel_handler_->SetIsDrawable(true);
+    parent_layer_->AddChild(wheel_handler_);
+
+    picture_ = FakePictureLayer::Create(&picture_client_);
+    picture_->SetBounds(gfx::Size(30, 30));
+    picture_->SetPosition(gfx::Point(10, 0));
+    picture_->SetIsDrawable(true);
+    parent_layer_->AddChild(picture_);
+
+    LayerTreeHostPictureTest::SetupTree();
+  }
+
+  virtual void BeginTest() OVERRIDE {
+    PostSetNeedsCommitToMainThread();
+  }
+
+  virtual void DrawLayersOnThread(LayerTreeHostImpl* impl) OVERRIDE {
+    LayerTreeHostPictureTest::DrawLayersOnThread(impl);
+    FakeContentLayerImpl* parent =
+          static_cast<FakeContentLayerImpl*>(impl->RootLayer()->children()[0]);
+    EXPECT_TRUE(parent->DrawsContent());
+    EXPECT_FALSE(parent->opacity());
+    EXPECT_EQ(0u, parent->append_quads_count());
+    ASSERT_EQ(2u, parent->children().size());
+
+    FakeContentLayerImpl* child =
+        static_cast<FakeContentLayerImpl*>(parent->children()[0]);
+    EXPECT_TRUE(child->opacity());
+    EXPECT_EQ(0u, child->append_quads_count());
+
+    FakePictureLayerImpl* picimpl =
+        static_cast<FakePictureLayerImpl*>(parent->children()[1]);
+    EXPECT_TRUE(picimpl->opacity());
+    EXPECT_EQ(0u, picimpl->append_quads_count());
+    EXPECT_EQ(0u, picimpl->update_tile_priorities_count());
+
+    EndTest();
+  }
+
+  virtual void AfterTest() OVERRIDE {}
+
+ private:
+  FakeContentLayerClient parent_client_;
+  FakeContentLayerClient picture_client_;
+  scoped_refptr<FakeContentLayer> parent_layer_;
+  scoped_refptr<FakeContentLayer> wheel_handler_;
+  scoped_refptr<FakePictureLayer> picture_;
+};
+
+MULTI_THREAD_TEST_F(
+    LayerTreeHostPictureNoUpdateTileProprityForZeroOpacityLayer);
+
 }  // namespace
 }  // namespace cc