ServiceWorker: Enable UseCounter for ServiceWorkerGlobalScope

third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index e22ac3b405e330206b0533c0d1184ea982b97bb7..3c2ac91d1143ccd87a792375c917f4a1e048b25e 100644
--- a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -356,16 +356,16 @@ bool ServiceWorkerGlobalScopeProxy::hasFetchEventHandler() {
   return m_workerGlobalScope->hasEventListeners(EventTypeNames::fetch);
 }
 
-void ServiceWorkerGlobalScopeProxy::countFeature(UseCounter::Feature) {
-  // TODO(nhiroki): Support UseCounter for ServiceWorker. Send an IPC message to
-  // the browser process and ask each controlled document to record API use in
-  // its UseCoutner (https://crbug.com/376039).
+void ServiceWorkerGlobalScopeProxy::countFeature(UseCounter::Feature feature) {
+  client().countFeature(static_cast<uint32_t>(feature));
 }
 
-void ServiceWorkerGlobalScopeProxy::countDeprecation(UseCounter::Feature) {
-  // TODO(nhiroki): Support UseCounter for ServiceWorker. Send an IPC message to
-  // the browser process and ask each controlled document to record API use in
-  // its UseCoutner (https://crbug.com/376039).
+void ServiceWorkerGlobalScopeProxy::countDeprecation(
+    UseCounter::Feature feature) {
+  // Go through the same code path with countFeature() because a deprecation
+  // message is already shown on the worker console and a remaining work is just
+  // to record an API use.

[haraken, 2017/02/08 04:28:45]

Nit: I'd prefer preparing separate methods for countFeature and
countDeprecation, instead of judging that by making countFeature call
Deprecation::deprecationMessage.

[nhiroki, 2017/02/09 05:11:32]

Removed the switch instead of adding a separate path. That was just for
bypassing DCHECK in UseCounter::count(Feature feature). I removed the check in a
separate patch for SharedWorker:
https://codereview.chromium.org/2586863002/#ps460001

In addition, calling countDeprecation() in document-side was wrong because it
prints a duplicate warning message.

+  countFeature(feature);
 }
 
 void ServiceWorkerGlobalScopeProxy::reportException(