Remove comparing PlatformAccelerator from operator== for Accelerator

ui/base/accelerators/accelerator.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.
 
 // This class describe a keyboard accelerator (or keyboard shortcut).
 // Keyboard accelerators are registered with the FocusManager.
 // It has a copy constructor and assignment operator so that it can be copied.
 // It also defines the < operator so that it can be used as a key in a std::map.
 //
 
@@ skipping 79 matching lines @@
  private:
   // The keycode (VK_...).
   KeyboardCode key_code_;
 
   KeyState key_state_;
 
   // The state of the Shift/Ctrl/Alt keys. This corresponds to Event::flags().
   int modifiers_;
 
   // Stores platform specific data. May be NULL.
+  // TODO: this is only used in Mac code and should be removed from here.
+  // http://crbug.com/702823.
   std::unique_ptr<PlatformAccelerator> platform_accelerator_;
 };
 
 // An interface that classes that want to register for keyboard accelerators
 // should implement.
 class UI_BASE_EXPORT AcceleratorTarget {
  public:
   // Should return true if the accelerator was processed.
   virtual bool AcceleratorPressed(const Accelerator& accelerator) = 0;
 
@@ skipping 16 matching lines @@
   virtual bool GetAcceleratorForCommandId(int command_id,
                                           Accelerator* accelerator) const = 0;
 
  protected:
   virtual ~AcceleratorProvider() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_ACCELERATORS_ACCELERATOR_H_