mash: Preliminary support for widget hit test masks

components/mus/ws/server_window.cc

 // Copyright 2014 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 "components/mus/ws/server_window.h"
 
 #include <inttypes.h>
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
@@ skipping 161 matching lines @@
     return;
   }
 
   additional_client_areas_ = additional_client_areas;
   client_area_ = insets;
   FOR_EACH_OBSERVER(
       ServerWindowObserver, observers_,
       OnWindowClientAreaChanged(this, insets, additional_client_areas));
 }
 
+void ServerWindow::SetHitTestMask(const gfx::Rect& mask) {
+  hit_test_mask_.reset(new gfx::Rect(mask));
+}
+
+void ServerWindow::ClearHitTestMask() {
+  hit_test_mask_.reset();
+}
+
 const ServerWindow* ServerWindow::GetRoot() const {
   return delegate_->GetRootWindow(this);
 }
 
 std::vector<const ServerWindow*> ServerWindow::GetChildren() const {
   std::vector<const ServerWindow*> children;
   children.reserve(children_.size());
   for (size_t i = 0; i < children_.size(); ++i)
     children.push_back(children_[i]);
   return children;
@@ skipping 262 matching lines @@
 }
 
 // static
 ServerWindow** ServerWindow::GetStackingTarget(ServerWindow* window) {
   return &window->stacking_target_;
 }
 
 }  // namespace ws
 
 }  // namespace mus