Fix "unreachable code" warnings (MSVC warning 4702) in content/.

content/child/npapi/webplugin_delegate_impl.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 "content/child/npapi/webplugin_delegate_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 269 matching lines @@
 bool WebPluginDelegateImpl::IsUserGesture(const WebInputEvent& event) {
   switch (event.type) {
     case WebInputEvent::MouseDown:
     case WebInputEvent::MouseUp:
     case WebInputEvent::KeyDown:
     case WebInputEvent::KeyUp:
       return true;
     default:
       return false;
   }
-  return false;
 }
 
 WebPluginResourceClient* WebPluginDelegateImpl::CreateResourceClient(
     unsigned long resource_id, const GURL& url, int notify_id) {
   return instance()->CreateStream(
       resource_id, url, std::string(), notify_id);
 }
 
 WebPluginResourceClient* WebPluginDelegateImpl::CreateSeekableResourceClient(
     unsigned long resource_id, int range_request_id) {
@@ skipping 23 matching lines @@
       resource_id, url, std::string(), notify_id);
 
   bool copy_stream_data = !!(quirks_ & PLUGIN_QUIRK_COPY_STREAM_DATA);
   plugin_stream->SetPluginURLFetcher(new PluginURLFetcher(
       plugin_stream, url, first_party_for_cookies, method, buf, len,
       referrer, notify_redirects, is_plugin_src_load, origin_pid,
       render_frame_id, render_view_id, resource_id, copy_stream_data));
 }
 
 }  // namespace content