Add blink-side binding code and tests for ServiceWorker -> Document postMessage (3/3)

Source/bindings/v8/custom/V8ClientCustom.cpp

Index: Source/bindings/v8/custom/V8ClientCustom.cpp
diff --git a/Source/bindings/v8/custom/V8ServiceWorkerCustom.cpp b/Source/bindings/v8/custom/V8ClientCustom.cpp
similarity index 79%
copy from Source/bindings/v8/custom/V8ServiceWorkerCustom.cpp
copy to Source/bindings/v8/custom/V8ClientCustom.cpp
index 76ae831623153386024f70b3d673097af5250d16..2c4677091d0f8f14acedbb4176e5ad495152975b 100644
--- a/Source/bindings/v8/custom/V8ServiceWorkerCustom.cpp
+++ b/Source/bindings/v8/custom/V8ClientCustom.cpp
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 #include "config.h"
-#include "V8ServiceWorker.h"
+#include "V8Client.h"
 
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
@@ -15,10 +15,10 @@
 
 namespace WebCore {
 
-void V8ServiceWorker::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
+void V8Client::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "postMessage", "ServiceWorker", info.Holder(), info.GetIsolate());
-    ServiceWorker* worker = V8ServiceWorker::toNative(info.Holder());
+    Client* client = V8Client::toNative(info.Holder());
     MessagePortArray ports;
     ArrayBufferArray arrayBuffers;
     if (info.Length() > 1) {
@@ -31,7 +31,8 @@ void V8ServiceWorker::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8:
     RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(info[0], &ports, &arrayBuffers, exceptionState, info.GetIsolate());
     if (exceptionState.throwIfNeeded())
         return;
-    worker->postMessage(message.release(), &ports, exceptionState);
+    ExecutionContext* context = currentExecutionContext(info.GetIsolate());
+    client->postMessage(context, message.release(), &ports, exceptionState);
     exceptionState.throwIfNeeded();
 }