[Chromecast] Add proxy server support to chromecast

chromecast/browser/cast_browser_process.cc

Index: chromecast/browser/cast_browser_process.cc
diff --git a/chromecast/browser/cast_browser_process.cc b/chromecast/browser/cast_browser_process.cc
index cf7101aab315a05cd2c52005d003c15de9ff24af..f27a061788106489b53dac7865c29ccccba088ad 100644
--- a/chromecast/browser/cast_browser_process.cc
+++ b/chromecast/browser/cast_browser_process.cc
@@ -16,6 +16,9 @@
 #include "chromecast/net/connectivity_checker.h"
 #include "chromecast/service/cast_service.h"
 #include "components/prefs/pref_service.h"
+#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/proxy/proxy_service.h"
 
 #if defined(OS_ANDROID)
 #include "components/crash/content/browser/crash_dump_manager_android.h"
@@ -47,6 +50,11 @@ CastBrowserProcess::CastBrowserProcess()
 
 CastBrowserProcess::~CastBrowserProcess() {
   DCHECK_EQ(g_instance, this);
+  pref_proxy_config_tracker_impl_->DetachFromPrefService();
+  connectivity_checker_->DetachFromPrefService();
+
+  content::BrowserThread::GetTaskRunnerForThread(content::BrowserThread::IO)
+      ->DeleteSoon(FROM_HERE, proxy_service_.release());
   if (pref_service_)
     pref_service_->CommitPendingWrite();
   g_instance = NULL;
@@ -94,6 +102,20 @@ void CastBrowserProcess::SetPrefService(
     std::unique_ptr<PrefService> pref_service) {
   DCHECK(!pref_service_);
   pref_service_.swap(pref_service);
+
+  pref_proxy_config_tracker_impl_ =

[wzhong, 2017/02/07 15:56:02]

I'd rather you have a separate function SetPrefProxyConfigTrackImpl().

[almasrymina, 2017/02/08 00:48:03]

Removed with new approach.

+      base::MakeUnique<PrefProxyConfigTrackerImpl>(
+          pref_service_.get(), content::BrowserThread::GetTaskRunnerForThread(
+                                   content::BrowserThread::IO));
+}
+
+void CastBrowserProcess::SetProxyService() {
+  std::unique_ptr<net::ProxyConfigService> proxy_config_service =
+      pref_proxy_config_tracker_impl_->CreateTrackingProxyConfigService(
+          nullptr);
+
+  proxy_service_ = net::ProxyService::CreateUsingSystemProxyResolver(
+      std::move(proxy_config_service), 0, nullptr);
 }
 
 void CastBrowserProcess::SetRemoteDebuggingServer(