events: Change gesture-event handler in EventHandler to not return any values.

chrome/browser/ui/views/browser_action_view.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 "chrome/browser/ui/views/browser_action_view.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/api/commands/command_service.h"
 #include "chrome/browser/extensions/api/commands/command_service_factory.h"
 #include "chrome/browser/extensions/extension_action.h"
@@ skipping 327 matching lines @@
     MenuButton::OnMouseExited(event);
   else
     TextButton::OnMouseExited(event);
 }
 
 bool BrowserActionButton::OnKeyReleased(const ui::KeyEvent& event) {
   return IsPopup() ? MenuButton::OnKeyReleased(event) :
                      TextButton::OnKeyReleased(event);
 }
 
-ui::EventResult BrowserActionButton::OnGestureEvent(ui::GestureEvent* event) {
-  return IsPopup() ? MenuButton::OnGestureEvent(event) :
-                     TextButton::OnGestureEvent(event);
+void BrowserActionButton::OnGestureEvent(ui::GestureEvent* event) {
+  if (IsPopup())
+    MenuButton::OnGestureEvent(event);
+  else
+    TextButton::OnGestureEvent(event);
 }
 
 bool BrowserActionButton::AcceleratorPressed(
     const ui::Accelerator& accelerator) {
   delegate_->OnBrowserActionExecuted(this);
   return true;
 }
 
 void BrowserActionButton::SetButtonPushed() {
   SetState(views::CustomButton::STATE_PRESSED);
@@ skipping 41 matching lines @@
 
   extensions::Command browser_action_command;
   if (!only_if_active || !command_service->GetBrowserActionCommand(
           extension_->id(),
           extensions::CommandService::ACTIVE_ONLY,
           &browser_action_command,
           NULL)) {
     GetFocusManager()->UnregisterAccelerator(*keybinding_.get(), this);
   }
 }