events: Update key-event handlers to not return EventResult.

ash/wm/workspace/frame_maximize_button.cc

 // 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.
 
 #include "ash/wm/workspace/frame_maximize_button.h"
 
 #include "ash/launcher/launcher.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_bubble_controller.h"
@@ skipping 29 matching lines @@
 
 // EscapeEventFilter is installed on the RootWindow to track when the escape key
 // is pressed. We use an EventFilter for this as the FrameMaximizeButton
 // normally does not get focus.
 class FrameMaximizeButton::EscapeEventFilter : public ui::EventHandler {
  public:
   explicit EscapeEventFilter(FrameMaximizeButton* button);
   virtual ~EscapeEventFilter();
 
   // EventFilter overrides:
-  virtual ui::EventResult OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
+  virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
 
  private:
   FrameMaximizeButton* button_;
 
   DISALLOW_COPY_AND_ASSIGN(EscapeEventFilter);
 };
 
 FrameMaximizeButton::EscapeEventFilter::EscapeEventFilter(
     FrameMaximizeButton* button)
     : button_(button) {
   Shell::GetInstance()->AddPreTargetHandler(this);
 }
 
 FrameMaximizeButton::EscapeEventFilter::~EscapeEventFilter() {
   Shell::GetInstance()->RemovePreTargetHandler(this);
 }
 
-ui::EventResult FrameMaximizeButton::EscapeEventFilter::OnKeyEvent(
+void FrameMaximizeButton::EscapeEventFilter::OnKeyEvent(
     ui::KeyEvent* event) {
   if (event->type() == ui::ET_KEY_PRESSED &&
       event->key_code() == ui::VKEY_ESCAPE) {
     button_->Cancel(false);
   }
-  return ui::ER_UNHANDLED;
 }
 
 // FrameMaximizeButton ---------------------------------------------------------
 
 FrameMaximizeButton::FrameMaximizeButton(views::ButtonListener* listener,
                                          views::NonClientFrameView* frame)
     : ImageButton(listener),
       frame_(frame),
       is_snap_enabled_(false),
       exceeded_drag_threshold_(false),
@@ skipping 473 matching lines @@
     return FRAME_STATE_SNAP_LEFT;
   if (bounds.right() == screen.right())
     return FRAME_STATE_SNAP_RIGHT;
   // If we come here, it is likely caused by the fact that the
   // "VerticalResizeDoubleClick" stored a restore rectangle. In that case
   // we allow all maximize operations (and keep the restore rectangle).
   return FRAME_STATE_NONE;
 }
 
 }  // namespace ash