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 481 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(MusCaptureClient);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMus, public:
 
 NativeWidgetMus::NativeWidgetMus(internal::NativeWidgetDelegate* delegate,
                                  shell::Connector* connector,
                                  ui::Window* window,
-                                 ui::mojom::SurfaceType surface_type)
+                                 ui::mojom::SurfaceType surface_type,
+                                 bool accept_events)
     : window_(window),
       last_cursor_(ui::mojom::Cursor::CURSOR_NULL),
       native_widget_delegate_(delegate),
       surface_type_(surface_type),
       show_state_before_fullscreen_(ui::mojom::ShowState::DEFAULT),
       ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
       content_(new aura::Window(this)),
       close_widget_factory_(this) {
   window_->set_input_event_handler(this);
   mus_window_observer_.reset(new MusWindowObserver(this));
@@ skipping 23 matching lines @@
   if (needs_bitmap_uploader) {
     bitmap_uploader_.reset(new bitmap_uploader::BitmapUploader(window));
     bitmap_uploader_->Init(connector);
     prop_.reset(
         new ui::ViewProp(window_tree_host_->GetAcceleratedWidget(),
                          bitmap_uploader::kBitmapUploaderForAcceleratedWidget,
                          bitmap_uploader_.get()));
   }
 
   aura::Env::GetInstance()->set_context_factory(default_context_factory);
+
+  if (accept_events == false) window_->SetAcceptEvents(false);

[sky, 2016/07/06 16:21:25]

nit: in general we don't use single line conditionals like this.

Also, you shouldn't need a new parameter for accept_events as it should be the
same as InitParams::accept_events. So, move this call to 
InitNativeWidget and use the value from InitParams.

[riajiang, 2016/07/08 17:59:59]

Done.

 }
 
 NativeWidgetMus::~NativeWidgetMus() {
   if (ownership_ == Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET) {
     DCHECK(!window_);
     delete native_widget_delegate_;
   } else {
     if (window_)
       window_->set_input_event_handler(nullptr);
     CloseNow();
@@ skipping 845 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