Fix visibility on WebLayer

ui/gfx/compositor/layer_unittest.cc

 // Copyright (c) 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 "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/compositor/compositor_observer.h"
@@ skipping 849 matching lines @@
 
   NullLayerDelegate delegate;
   l1->set_delegate(&delegate);
   l2->set_delegate(&delegate);
   l3->set_delegate(&delegate);
 
   // Layers should initially be drawn.
   EXPECT_TRUE(l1->IsDrawn());
   EXPECT_TRUE(l2->IsDrawn());
   EXPECT_TRUE(l3->IsDrawn());
+#if defined(USE_WEBKIT_COMPOSITOR)
+  EXPECT_EQ(1.f, l1->web_layer().opacity());
+  EXPECT_EQ(1.f, l2->web_layer().opacity());
+  EXPECT_EQ(1.f, l3->web_layer().opacity());
+#endif
 
   compositor()->SetRootLayer(l1.get());
 
   Draw();
 
   l1->SetVisible(false);
   EXPECT_FALSE(l1->IsDrawn());
   EXPECT_FALSE(l2->IsDrawn());
   EXPECT_FALSE(l3->IsDrawn());
+#if defined(USE_WEBKIT_COMPOSITOR)
+  EXPECT_EQ(0.f, l1->web_layer().opacity());
+#endif
 
   l3->SetVisible(false);
   EXPECT_FALSE(l1->IsDrawn());
   EXPECT_FALSE(l2->IsDrawn());
   EXPECT_FALSE(l3->IsDrawn());
+#if defined(USE_WEBKIT_COMPOSITOR)
+  EXPECT_EQ(0.f, l3->web_layer().opacity());
+#endif
 
   l1->SetVisible(true);
   EXPECT_TRUE(l1->IsDrawn());
   EXPECT_TRUE(l2->IsDrawn());
   EXPECT_FALSE(l3->IsDrawn());
+#if defined(USE_WEBKIT_COMPOSITOR)
+  EXPECT_EQ(1.f, l1->web_layer().opacity());
+#endif
 }
 
 } // namespace ui