mac: Prepare for -Wunused-functions.

content/browser/renderer_host/render_widget_host_view_guest.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 "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
@@ skipping 11 matching lines @@
 #endif
 
 #if defined(OS_WIN) || defined(USE_AURA)
 #include "content/browser/renderer_host/ui_events_helper.h"
 #endif
 
 namespace content {
 
 namespace {
 
+#if defined(OS_WIN) || defined(USE_AURA)
 bool ShouldSendPinchGesture() {
   static bool pinch_allowed =
       CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnablePinch);
   return pinch_allowed;
 }
 
 blink::WebGestureEvent CreateFlingCancelEvent(double time_stamp) {
   blink::WebGestureEvent gesture_event;
   gesture_event.timeStampSeconds = time_stamp;
   gesture_event.type = blink::WebGestureEvent::GestureFlingCancel;
   gesture_event.sourceDevice = blink::WebGestureEvent::Touchscreen;
   return gesture_event;
 }
+#endif  // defined(OS_WIN) || defined(USE_AURA)
 
 }  // namespace
 
 RenderWidgetHostViewGuest::RenderWidgetHostViewGuest(
     RenderWidgetHost* widget_host,
     BrowserPluginGuest* guest,
     RenderWidgetHostView* platform_view)
     : host_(RenderWidgetHostImpl::From(widget_host)),
       guest_(guest),
       platform_view_(static_cast<RenderWidgetHostViewPort*>(platform_view)) {
@@ skipping 520 matching lines @@
     return;
   for (ui::GestureRecognizer::Gestures::iterator g_it = gestures->begin();
       g_it != gestures->end();
       ++g_it) {
     ForwardGestureEventToRenderer(*g_it);
   }
 }
 
 
 }  // namespace content