Implement NativeViewHostAura::InstallClip.

ui/views/controls/native/native_view_host_unittest.cc

Index: ui/views/controls/native/native_view_host_unittest.cc
diff --git a/ui/views/controls/native/native_view_host_unittest.cc b/ui/views/controls/native/native_view_host_unittest.cc
index 247782437a5022d0d45cc68ee4277789ca2b69b1..2540732ff937b80643a23819364de9c5caf4df3c 100644
--- a/ui/views/controls/native/native_view_host_unittest.cc
+++ b/ui/views/controls/native/native_view_host_unittest.cc
@@ -134,8 +134,13 @@ TEST_F(NativeViewHostTest, NativeViewHierarchyChanged) {
                                               toplevel()->GetRootView(),
                                               test_view,
                                               host));
-
+#if defined(USE_AURA)
+  // One notification is generated from inserting the native view into the
+  // clipping window.
+  EXPECT_EQ(1, test_view->notification_count());
+#else
   EXPECT_EQ(0, test_view->notification_count());
+#endif
   test_view->ResetCount();
 
   // Detaching should send a NativeViewHierarchyChanged() notification and
@@ -150,8 +155,15 @@ TEST_F(NativeViewHostTest, NativeViewHierarchyChanged) {
   // reset the parent.
   host->Attach(child->GetNativeView());
   EXPECT_EQ(1, test_view->notification_count());
+#if defined(USE_AURA)
+  // There is a clipping window inserted above the native view that needs to be
+  // accounted for when looking at the relationship between the native views.
+  EXPECT_EQ(toplevel()->GetNativeView(),
+            GetNativeParent(GetNativeParent(child->GetNativeView())));
+#else
   EXPECT_EQ(toplevel()->GetNativeView(),
             GetNativeParent(child->GetNativeView()));
+#endif
 }
 
 // Verifies ViewHierarchyChanged handles NativeViewHost remove, add and move