app_list: Fix shadow bleeds over launcher button and steals mouse events

ui/views/widget/widget.cc

 // Copyright (c) 2012 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 "ui/views/widget/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/hit_test.h"
@@ skipping 1112 matching lines @@
 }
 
 bool Widget::ExecuteCommand(int command_id) {
   return widget_delegate_->ExecuteWindowsCommand(command_id);
 }
 
 InputMethod* Widget::GetInputMethodDirect() {
   return input_method_.get();
 }
 
+bool Widget::HasHitTestMask() const {
+  return widget_delegate_->HasHitTestMask();
+}
+
+void Widget::GetHitTestMask(gfx::Path* mask) const {
+  DCHECK(mask);
+  widget_delegate_->GetHitTestMask(mask);
+}
+
 Widget* Widget::AsWidget() {
   return this;
 }
 
 const Widget* Widget::AsWidget() const {
   return this;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Widget, FocusTraversable implementation:
@@ skipping 138 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views