Rewrite release event only if press event was rewritten for a given device.

chrome/browser/ui/ash/event_rewriter.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_ASH_EVENT_REWRITER_H_
 #define CHROME_BROWSER_UI_ASH_EVENT_REWRITER_H_
 
 #include <map>
+#include <set>
 #include <string>
 
 #include "ash/event_rewriter_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/root_window_observer.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
@@ skipping 52 matching lines @@
   void set_xkeyboard_for_testing(chromeos::input_method::XKeyboard* xkeyboard) {
     xkeyboard_for_testing_ = xkeyboard;
   }
 #endif
 
   // Gets DeviceType from the |device_name|.
   static DeviceType GetDeviceType(const std::string& device_name);
 
  private:
   friend class EventRewriterAshTest;
+  friend class EventRewriterTest;
 
   // ash::EventRewriterDelegate overrides:
   virtual ash::EventRewriterDelegate::Action RewriteOrFilterKeyEvent(
       ui::KeyEvent* event) OVERRIDE;
   virtual ash::EventRewriterDelegate::Action RewriteOrFilterLocatedEvent(
       ui::LocatedEvent* event) OVERRIDE;
 
   // aura::RootWindowObserver overrides:
   virtual void OnKeyboardMappingChanged(const aura::RootWindow* root) OVERRIDE;
 
@@ skipping 125 matching lines @@
                                 int* remapped_flags,
                                 unsigned int* remapped_native_modifiers) const;
 
   std::map<int, DeviceType> device_id_to_type_;
   int last_device_id_;
 
 #if defined(OS_CHROMEOS)
   // A mapping from X11 KeySym keys to KeyCode values.
   base::hash_map<unsigned long, unsigned long> keysym_to_keycode_map_;
 
+  // A set of device IDs whose press event has been rewritten.
+  std::set<int> pressed_device_ids_;
+
   chromeos::input_method::XKeyboard* xkeyboard_for_testing_;
 
   scoped_ptr<chromeos::KeyboardDrivenEventRewriter>
       keyboard_driven_event_rewriter_;
 #endif
 
   const PrefService* pref_service_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(EventRewriter);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_EVENT_REWRITER_H_