Makes DesktopWindowTreeHostXxx to dispatch key event to InputMethod.

ash/host/ash_window_tree_host_x11.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 "ash/host/ash_window_tree_host_x11.h"
 
 #include <X11/extensions/Xfixes.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
@@ skipping 221 matching lines @@
 }
 void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
     ui::LocatedEvent* event) {
   TranslateLocatedEvent(event);
   SendEventToProcessor(event);
 }
 
 bool AshWindowTreeHostX11::DispatchKeyEventPostIME(const ui::KeyEvent& event) {
   ui::KeyEvent event_copy(event);
   input_method_handler()->SetPostIME(true);
-  ui::EventSource::DeliverEventToProcessor(&event_copy);
+  ui::EventDispatchDetails details =
+      event_processor()->OnEventFromSource(&event_copy);
+  DCHECK(!details.dispatcher_destroyed);

[sadrul, 2015/07/19 01:07:30]

Do these DCHECK()s not trip when, for example, ctrl+shift+Q is pressed to
terminate the shell?

[Shu Chen, 2015/07/20 05:46:09]

Done. I've changed it to use ignore_result().

[sadrul, 2015/07/22 01:04:38]

This should either be a DCHECK, or an early return if dispatcher_destroyed
(otherwise the next line can do a uaF)

[Shu Chen, 2015/07/22 01:19:06]

Done.

   input_method_handler()->SetPostIME(false);
   return event_copy.stopped_propagation();
 }
 
-ui::EventDispatchDetails AshWindowTreeHostX11::DeliverEventToProcessor(
-    ui::Event* event) {
-  return ui::EventSource::DeliverEventToProcessor(event);
-}
-
 #if defined(OS_CHROMEOS)
 void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
   if (!ui::IsXInput2Available())
     return;
   // Temporarily pause tap-to-click when the cursor is hidden.
   Atom prop = atom_cache()->GetAtom("Tap Paused");
   unsigned char value = state;
   const XIDeviceList& dev_list =
       ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(xdisplay());
 
@@ skipping 33 matching lines @@
 #endif
 
 AshWindowTreeHost* AshWindowTreeHost::Create(
     const AshWindowTreeHostInitParams& init_params) {
   if (init_params.offscreen)
     return new AshWindowTreeHostUnified(init_params.initial_bounds);
   return new AshWindowTreeHostX11(init_params.initial_bounds);
 }
 
 }  // namespace ash