mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

ui/views/mus/native_widget_mus.cc

 // Copyright 2015 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/mus/native_widget_mus.h"
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 664 matching lines @@
   return new ClientSideNonClientFrameView(GetWidget());
 }
 
 void NativeWidgetMus::InitNativeWidget(const Widget::InitParams& params) {
   NativeWidgetAura::RegisterNativeWidgetForWindow(this, content_);
   aura::Window* hosted_window = window_tree_host_->window();
 
   ownership_ = params.ownership;
   window_->SetCanFocus(params.activatable ==
                        Widget::InitParams::ACTIVATABLE_YES);
+  if (!params.accept_events)
+    window_->SetAcceptEvents(params.accept_events);

[sadrul, 2016/07/09 14:51:22]

You can do this unconditionally (like SetCanFocus above). Although I suppose it
would make sense to teach ui::Window to not send any IPC if the setting is not
changing?

[riajiang, 2016/07/11 15:48:38]

Changed it to do the checking in window_tree_client before it sends IPC calls.

 
   window_tree_host_->AddObserver(this);
   window_tree_host_->InitHost();
   hosted_window->SetProperty(kMusWindow, window_);
 
   focus_client_.reset(
       new FocusControllerMus(new FocusRulesImpl(hosted_window)));
 
   aura::client::SetFocusClient(hosted_window, focus_client_.get());
   aura::client::SetActivationClient(hosted_window, focus_client_.get());
@@ skipping 706 matching lines @@
 
   gfx::Path mask_path;
   native_widget_delegate_->GetHitTestMask(&mask_path);
   // TODO(jamescook): Use the full path for the mask.
   gfx::Rect mask_rect =
       gfx::ToEnclosingRect(gfx::SkRectToRectF(mask_path.getBounds()));
   window_->SetHitTestMask(mask_rect);
 }
 
 }  // namespace views