compositor-worker: Add CompositorProxyClient worker client of CompositorWorker.

third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp

Index: third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp
diff --git a/third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp b/third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp
index 3eefc6ac2809d657c9ed86b7a22aaaa1ff712249..8e95a02af05b943a12060a027c29258f74460e59 100644
--- a/third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp
+++ b/third_party/WebKit/Source/modules/compositorworker/CompositorWorker.cpp
@@ -5,8 +5,10 @@
 #include "modules/compositorworker/CompositorWorker.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "core/dom/CompositorProxyClient.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/page/ChromeClient.h"
 #include "core/workers/WorkerClients.h"
 #include "modules/EventTargetModules.h"
 #include "modules/compositorworker/CompositorWorkerMessagingProxy.h"
@@ -42,10 +44,12 @@ const AtomicString& CompositorWorker::interfaceName() const
     return EventTargetNames::CompositorWorker;
 }
 
-InProcessWorkerGlobalScopeProxy* CompositorWorker::createInProcessWorkerGlobalScopeProxy(ExecutionContext* worker)
+InProcessWorkerGlobalScopeProxy* CompositorWorker::createInProcessWorkerGlobalScopeProxy(ExecutionContext* context)
 {
-    ASSERT(getExecutionContext()->isDocument());
-    return new CompositorWorkerMessagingProxy(this);
+    Document* document = toDocument(context);
+    WorkerClients* workerClients = WorkerClients::create();
+    provideCompositorProxyClientTo(workerClients, document->frame()->chromeClient().createCompositorProxyClient());

[haraken, 2016/05/09 02:05:55]

As commented in the original CL (https://codereview.chromium.org/1895873006),
I'm not sure if this is a right way to inject the worker client. Shared workers
and dedicated workers create their worker clients via
WebWorkerContentSettingsClientProxy.

+falken +kinuko

+    return new CompositorWorkerMessagingProxy(this, workerClients);
 }
 
 } // namespace blink