Set capture to the window being dragged when dragging a window on Ash

ui/aura/window_tree_host_ozone.cc

 // Copyright 2013 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/aura/window_tree_host_ozone.h"
 
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/platform_window/platform_window.h"
 
@@ skipping 68 matching lines @@
 
 void WindowTreeHostOzone::SetBounds(const gfx::Rect& bounds) {
   platform_window_->SetBounds(bounds);
 }
 
 gfx::Point WindowTreeHostOzone::GetLocationOnNativeScreen() const {
   return platform_window_->GetBounds().origin();
 }
 
 void WindowTreeHostOzone::SetCapture() {
-  platform_window_->SetCapture();
+  //platform_window_->SetCapture();

[pkotwicz, 2014/12/08 20:05:18]

I have commented this out to demonstrate that native capture is unnecessary. I
do not plan on landing the change to this file. I do plan on landing the change
to toplevel_window_event_handler.cc

https://codereview.chromium.org/780273003/ is necessary if native capture is
enabled.

 }
 
 void WindowTreeHostOzone::ReleaseCapture() {
-  platform_window_->ReleaseCapture();
+  //platform_window_->ReleaseCapture();
 }
 
 void WindowTreeHostOzone::SetCursorNative(gfx::NativeCursor cursor) {
   if (cursor == current_cursor_)
     return;
   current_cursor_ = cursor;
   platform_window_->SetCursor(cursor.platform());
 }
 
 void WindowTreeHostOzone::MoveCursorToNative(const gfx::Point& location) {
@@ skipping 13 matching lines @@
   return new WindowTreeHostOzone(bounds);
 }
 
 // static
 gfx::Size WindowTreeHost::GetNativeScreenSize() {
   NOTIMPLEMENTED();
   return gfx::Size();
 }
 
 }  // namespace aura