Remove postMessage, MessageChannel and MessagePort.

sky/engine/public/platform/Platform.h

Index: sky/engine/public/platform/Platform.h
diff --git a/sky/engine/public/platform/Platform.h b/sky/engine/public/platform/Platform.h
index d542900c23d6c1f9df43f86ad985aee2d5e48d3f..e4dadb48f31837f44b1ce4f09eae75f2397f68a7 100644
--- a/sky/engine/public/platform/Platform.h
+++ b/sky/engine/public/platform/Platform.h
@@ -60,7 +60,6 @@ class WebFlingAnimator;
 class WebGestureCurveTarget;
 class WebGestureCurve;
 class WebGraphicsContext3DProvider;
-class WebMessagePortChannel;
 class WebMimeRegistry;
 class WebPublicSuffixList;
 class WebSandboxSupport;
@@ -169,14 +168,6 @@ public:
     // See comments on ImageDecoder::m_maxDecodedBytes.
     virtual size_t maxDecodedImageBytes() { return noDecodedImageByteLimit; }
 
-
-    // Message Ports -------------------------------------------------------
-
-    // Creates a Message Port Channel pair. This can be called on any thread.
-    // The returned objects should only be used on the thread they were created on.
-    virtual void createMessageChannel(WebMessagePortChannel** channel1, WebMessagePortChannel** channel2) { *channel1 = 0; *channel2 = 0; }
-
-
     // Network -------------------------------------------------------------
 
     // Returns a new WebURLLoader instance.