Implement a ResourceThrottle for URL overriding in Chrome on Android.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/user_script_listener.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/instant/instant_loader.h"
 #include "chrome/browser/net/load_timing_observer.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/browser/renderer_host/chrome_url_request_user_data.h"
+#include "chrome/browser/renderer_host/intercept_navigation_resource_throttle.h"
 #include "chrome/browser/renderer_host/safe_browsing_resource_throttle.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/auto_login_prompter.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/user_script.h"
 #include "chrome/common/metrics/experiments_helper.h"
 #include "chrome/common/metrics/proto/chrome_experiments.pb.h"
 #include "chrome/common/render_messages.h"
@@ skipping 90 matching lines @@
   if (is_continuation_of_transferred_request)
     ChromeURLRequestUserData::Delete(request);
 
   ChromeURLRequestUserData* user_data =
       ChromeURLRequestUserData::Create(request);
   if (prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id)) {
     user_data->set_is_prerender(true);
     request->set_priority(net::IDLE);
   }
 
+  if (resource_type == ResourceType::MAIN_FRAME) {
 #if defined(OS_CHROMEOS)
-  if (resource_type == ResourceType::MAIN_FRAME) {
     // We check offline first, then check safe browsing so that we still can
     // block unsafe site after we remove offline page.
     throttles->push_back(new OfflineResourceThrottle(
         child_id, route_id, request, resource_context));
+#elif defined(OS_ANDROID)
+    throttles->push_back(new InterceptNavigationResourceThrottle(request));
+#endif
   }
-#endif
 
   AppendChromeMetricsHeaders(request, resource_context, resource_type);
 
   AppendStandardResourceThrottles(request,
                                   resource_context,
                                   child_id,
                                   route_id,
                                   resource_type,
                                   throttles);
 }
@@ skipping 257 matching lines @@
   if (base::Base64Encode(serialized, &hashed)) {
     // If successful, swap the header value with the new one.
     // Note that the list of IDs and the header could be temporarily out of sync
     // if IDs are added as we are recreating the header, but we're OK with those
     // descrepancies.
     variation_ids_header_ = hashed;
   } else {
     DVLOG(1) << "Failed to base64 encode Variation IDs value: " << serialized;
   }
 }