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

ash/wm/workspace/workspace_event_handler.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/workspace_event_handler.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_util.h"
@@ skipping 47 matching lines @@
 WorkspaceEventHandler::WorkspaceEventHandler(aura::Window* owner)
     : ToplevelWindowEventHandler(owner),
       destroyed_(NULL) {
 }
 
 WorkspaceEventHandler::~WorkspaceEventHandler() {
   if (destroyed_)
     *destroyed_ = true;
 }
 
-ui::EventResult WorkspaceEventHandler::OnMouseEvent(ui::MouseEvent* event) {
+void WorkspaceEventHandler::OnMouseEvent(ui::MouseEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   switch (event->type()) {
     case ui::ET_MOUSE_MOVED: {
       int component =
           target->delegate()->GetNonClientComponent(event->location());
       multi_window_resize_controller_.Show(target, component,
                                            event->location());
       break;
     }
     case ui::ET_MOUSE_ENTERED:
       break;
     case ui::ET_MOUSE_CAPTURE_CHANGED:
     case ui::ET_MOUSE_EXITED:
       break;
     case ui::ET_MOUSE_PRESSED: {
       // Maximize behavior is implemented as post-target handling so the target
       // can cancel it.
-      if (ui::EventCanceledDefaultHandling(*event))
-        return ToplevelWindowEventHandler::OnMouseEvent(event);
+      if (ui::EventCanceledDefaultHandling(*event)) {
+        ToplevelWindowEventHandler::OnMouseEvent(event);
+        return;
+      }
 
       if (event->flags() & ui::EF_IS_DOUBLE_CLICK &&
           target->delegate()->GetNonClientComponent(event->location()) ==
           HTCAPTION) {
         bool destroyed = false;
         destroyed_ = &destroyed;
         ToggleMaximizedState(target);
         if (destroyed)
-          return ui::ER_UNHANDLED;
+          return;
         destroyed_ = NULL;
       }
       multi_window_resize_controller_.Hide();
       HandleVerticalResizeDoubleClick(target, event);
       break;
     }
     default:
       break;
   }
-  return ToplevelWindowEventHandler::OnMouseEvent(event);
+  ToplevelWindowEventHandler::OnMouseEvent(event);
 }
 
 void WorkspaceEventHandler::OnGestureEvent(ui::GestureEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   if (event->type() == ui::ET_GESTURE_DOUBLE_TAP &&
       target->delegate()->GetNonClientComponent(event->location()) ==
       HTCAPTION) {
     ToggleMaximizedState(target);  // |this| may be destroyed from here.
     event->StopPropagation();
     return;
@@ skipping 42 matching lines @@
                                      target->bounds().y(),
                                      work_area.width(),
                                      target->bounds().height()));
       }
     }
   }
 }
 
 }  // namespace internal
 }  // namespace ash