Add window.postMessage() use counters.

Source/bindings/core/v8/custom/V8WindowCustom.cpp

 /*
  * Copyright (C) 2009, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 36 matching lines @@
 #include "bindings/core/v8/V8Node.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/MessagePort.h"
 #include "core/frame/DOMTimer.h"
 #include "core/frame/DOMWindowTimers.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
+#include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLDocument.h"
 #include "core/inspector/ScriptCallStack.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoader.h"
 #include "core/storage/Storage.h"
 #include "platform/PlatformScreen.h"
 #include "platform/graphics/media/MediaPlayer.h"
 #include "wtf/Assertions.h"
@@ skipping 171 matching lines @@
 }
 
 
 void V8Window::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     // None of these need to be RefPtr because info and context are guaranteed
     // to hold on to them.
     LocalDOMWindow* window = V8Window::toImpl(info.Holder());
     LocalDOMWindow* source = callingDOMWindow(info.GetIsolate());
 
+    ASSERT(window);
+    UseCounter::countIfNotPrivateScript(info.GetIsolate(), window->document(), UseCounter::WindowPostMessage);

[Mike West, 2014/10/22 07:57:01]

Aside: Ooh. countIfNotPrivateScript is... verbose. When did that get added?

[sof, 2014/10/22 08:00:33]

Added a couple of days ago, https://codereview.chromium.org/656693002/

(I wouldn't put it past private scripts to use postMessage(), hence its usage
here also.)

+
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "postMessage", "Window", info.Holder(), info.GetIsolate());
 
     // If called directly by WebCore we don't have a calling context.
     if (!source) {
         exceptionState.throwTypeError("No active calling context exists.");
         exceptionState.throwIfNeeded();
         return;
     }
 
     // This function has variable arguments and can be:
     // Per current spec:
     //   postMessage(message, targetOrigin)
     //   postMessage(message, targetOrigin, {sequence of transferrables})
     // Legacy non-standard implementations in webkit allowed:
     //   postMessage(message, {sequence of transferrables}, targetOrigin);
     MessagePortArray portArray;
     ArrayBufferArray arrayBufferArray;
     int targetOriginArgIndex = 1;
     if (info.Length() > 2) {
         int transferablesArgIndex = 2;
         if (isLegacyTargetOriginDesignation(info[2])) {
+            UseCounter::countIfNotPrivateScript(info.GetIsolate(), window->document(), UseCounter::WindowPostMessageWithLegacyTargetOriginArgument);
             targetOriginArgIndex = 2;
             transferablesArgIndex = 1;
         }
         if (!SerializedScriptValue::extractTransferables(info.GetIsolate(), info[transferablesArgIndex], transferablesArgIndex, portArray, arrayBufferArray, exceptionState)) {
             exceptionState.throwIfNeeded();
             return;
         }
     }
     TOSTRING_VOID(V8StringResource<TreatNullAndUndefinedAsNullString>, targetOrigin, info[targetOriginArgIndex]);
 
@@ skipping 263 matching lines @@
     v8::Handle<v8::Context> context = toV8Context(frame, DOMWrapperWorld::current(isolate));
     if (context.IsEmpty())
         return v8Undefined();
 
     v8::Handle<v8::Object> global = context->Global();
     ASSERT(!global.IsEmpty());
     return global;
 }
 
 } // namespace blink