Add a gyp flag to allow removing dependency on ppapi.

chrome/browser/chrome_content_browser_client.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/chrome_content_browser_client.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 1734 matching lines @@
 FilePath ChromeContentBrowserClient::GetDefaultDownloadDirectory() {
   return download_util::GetDefaultDownloadDirectory();
 }
 
 std::string ChromeContentBrowserClient::GetDefaultDownloadName() {
   return l10n_util::GetStringUTF8(IDS_DEFAULT_DOWNLOAD_FILENAME);
 }
 
 void ChromeContentBrowserClient::DidCreatePpapiPlugin(
     content::BrowserPpapiHost* browser_host) {
+#if defined(ENABLE_PPAPI)
   browser_host->GetPpapiHost()->AddHostFactoryFilter(
       scoped_ptr<ppapi::host::HostFactory>(
           new ChromeBrowserPepperHostFactory(browser_host)));
+#endif
 }
 
 content::BrowserPpapiHost*
     ChromeContentBrowserClient::GetExternalBrowserPpapiHost(
         int plugin_process_id) {
   BrowserChildProcessHostIterator iter(content::PROCESS_TYPE_NACL_LOADER);
   while (!iter.Done()) {
     NaClProcessHost* host = static_cast<NaClProcessHost*>(iter.GetDelegate());
     if (host->process() &&
         host->process()->GetData().id == plugin_process_id) {
@@ skipping 162 matching lines @@
     io_thread_application_locale_ = locale;
 }
 
 void ChromeContentBrowserClient::SetApplicationLocaleOnIOThread(
     const std::string& locale) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   io_thread_application_locale_ = locale;
 }
 
 }  // namespace chrome