Move WebSocketHandleImpl into Blink (take 2)

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index b08300f0ce605991cf1d92037620f2bddbc45ce6..f1d90b5ff366a741d5165de4a27ee171e1d2b5fb 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -107,7 +107,6 @@ class WebSandboxSupport;
 class WebScrollbarBehavior;
 class WebSecurityOrigin;
 class WebServiceWorkerCacheStorage;
-class WebSocketHandle;
 class WebSpeechSynthesizer;
 class WebSpeechSynthesizerClient;
 class WebStorageNamespace;
@@ -304,9 +303,6 @@ public:
     // May return null.
     virtual WebPrescientNetworking* prescientNetworking() { return nullptr; }
 
-    // Returns a new WebSocketHandle instance.
-    virtual WebSocketHandle* createWebSocketHandle() { return nullptr; }
-
     // Returns the User-Agent string.
     virtual WebString userAgent() { return WebString(); }