Report data usage UMA for Chrome services

sync/internal_api/http_bridge.cc

Index: sync/internal_api/http_bridge.cc
diff --git a/sync/internal_api/http_bridge.cc b/sync/internal_api/http_bridge.cc
index 04e339ce6a5ad2e81318203e7b5ece435ebe4735..6da0dd31e8538eac57c68e9f9202afe09ca9015b 100644
--- a/sync/internal_api/http_bridge.cc
+++ b/sync/internal_api/http_bridge.cc
@@ -161,8 +161,11 @@ HttpBridgeFactory::~HttpBridgeFactory() {
   cancelation_signal_->UnregisterHandler(this);
 }
 
-void HttpBridgeFactory::Init(const std::string& user_agent) {
+void HttpBridgeFactory::Init(
+    const std::string& user_agent,
+    const BindToTrackerCallback& bind_to_tracker_callback) {
   user_agent_ = user_agent;
+  bind_to_tracker_callback_ = bind_to_tracker_callback;
 }
 
 HttpPostProviderInterface* HttpBridgeFactory::Create() {
@@ -174,8 +177,9 @@ HttpPostProviderInterface* HttpBridgeFactory::Create() {
   // we've been asked to shut down.
   CHECK(request_context_getter_.get());
 
-  scoped_refptr<HttpBridge> http = new HttpBridge(
-      user_agent_, request_context_getter_, network_time_update_callback_);
+  scoped_refptr<HttpBridge> http =
+      new HttpBridge(user_agent_, request_context_getter_,
+                     network_time_update_callback_, bind_to_tracker_callback_);
   http->AddRef();
   return http.get();
 }
@@ -204,14 +208,15 @@ HttpBridge::URLFetchState::~URLFetchState() {}
 HttpBridge::HttpBridge(
     const std::string& user_agent,
     const scoped_refptr<net::URLRequestContextGetter>& context_getter,
-    const NetworkTimeUpdateCallback& network_time_update_callback)
+    const NetworkTimeUpdateCallback& network_time_update_callback,
+    const BindToTrackerCallback& bind_to_tracker_callback)
     : created_on_loop_(base::MessageLoop::current()),
       user_agent_(user_agent),
       http_post_completed_(false, false),
       request_context_getter_(context_getter),
       network_task_runner_(request_context_getter_->GetNetworkTaskRunner()),
-      network_time_update_callback_(network_time_update_callback) {
-}
+      network_time_update_callback_(network_time_update_callback),
+      bind_to_tracker_callback_(bind_to_tracker_callback) {}
 
 HttpBridge::~HttpBridge() {
 }
@@ -313,6 +318,8 @@ void HttpBridge::MakeAsynchronousPost() {
   fetch_state_.url_poster =
       net::URLFetcher::Create(url_for_request_, net::URLFetcher::POST, this)
           .release();
+  if (!bind_to_tracker_callback_.is_null())
+    bind_to_tracker_callback_.Run(fetch_state_.url_poster);
   fetch_state_.url_poster->SetRequestContext(request_context_getter_.get());
   fetch_state_.url_poster->SetExtraRequestHeaders(extra_headers_);