Simplify BrowserContext by removing redundant methods.

chromecast/browser/cast_browser_main_parts.cc

Index: chromecast/browser/cast_browser_main_parts.cc
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index e904f784305cee5ceb7a00f8d04e1e30411fe160..6bb16dcb2ea69cea7744bc910b26ec1a398836a7 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -50,6 +50,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/gpu_data_manager.h"
+#include "content/public/browser/storage_partition.h"
 #include "content/public/common/content_switches.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "media/audio/audio_manager.h"
@@ -399,7 +400,9 @@ void CastBrowserMainParts::PreMainMessageLoopRun() {
       metrics::CastMetricsServiceClient::Create(
           content::BrowserThread::GetBlockingPool(),
           cast_browser_process_->pref_service(),
-          cast_browser_process_->browser_context()->GetRequestContext()));
+          content::BrowserContext::GetDefaultStoragePartition(
+              cast_browser_process_->browser_context())->
+                  GetURLRequestContext()));
 
   if (!PlatformClientAuth::Initialize())
     LOG(ERROR) << "PlatformClientAuth::Initialize failed.";