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

ash/tooltips/tooltip_controller.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/tooltips/tooltip_controller.h"
 
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
@@ skipping 241 matching lines @@
 void TooltipController::OnKeyEvent(ui::KeyEvent* event) {
   // On key press, we want to hide the tooltip and not show it until change.
   // This is the same behavior as hiding tooltips on timeout. Hence, we can
   // simply simulate a timeout.
   if (tooltip_shown_timer_.IsRunning()) {
     tooltip_shown_timer_.Stop();
     TooltipShownTimerFired();
   }
 }
 
-ui::EventResult TooltipController::OnMouseEvent(ui::MouseEvent* event) {
+void TooltipController::OnMouseEvent(ui::MouseEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   switch (event->type()) {
     case ui::ET_MOUSE_MOVED:
     case ui::ET_MOUSE_DRAGGED:
       if (tooltip_window_ != target) {
         if (tooltip_window_)
           tooltip_window_->RemoveObserver(this);
         tooltip_window_ = target;
         tooltip_window_->AddObserver(this);
       }
@@ skipping 18 matching lines @@
       // We will not received a mouse release, so reset mouse pressed state.
       mouse_pressed_ = false;
     case ui::ET_MOUSEWHEEL:
       // Hide the tooltip for click, release, drag, wheel events.
       if (GetTooltip()->IsVisible())
         GetTooltip()->Hide();
       break;
     default:
       break;
   }
-  return ui::ER_UNHANDLED;
 }
 
 void TooltipController::OnTouchEvent(ui::TouchEvent* event) {
   // TODO(varunjain): need to properly implement tooltips for
   // touch events.
   // Hide the tooltip for touch events.
   if (GetTooltip()->IsVisible())
     GetTooltip()->Hide();
   if (tooltip_window_)
     tooltip_window_->RemoveObserver(this);
@@ skipping 167 matching lines @@
 }
 
 TooltipController::Tooltip* TooltipController::GetTooltip() {
   if (!tooltip_.get())
     tooltip_.reset(new Tooltip(this));
   return tooltip_.get();
 }
 
 }  // namespace internal
 }  // namespace ash