Make websocket error messages look better at the devtools console.

Source/modules/websockets/MainThreadWebSocketChannel.h

Index: Source/modules/websockets/MainThreadWebSocketChannel.h
diff --git a/Source/modules/websockets/MainThreadWebSocketChannel.h b/Source/modules/websockets/MainThreadWebSocketChannel.h
index 4f5a49917142e54611ae8f2af3aec7e043770e05..d87f3901c7884c52871680cb622d1b2cc6116892 100644
--- a/Source/modules/websockets/MainThreadWebSocketChannel.h
+++ b/Source/modules/websockets/MainThreadWebSocketChannel.h
@@ -33,6 +33,7 @@
 
 #include "core/fileapi/FileReaderLoaderClient.h"
 #include "core/inspector/ScriptCallFrame.h"
+#include "core/page/ConsoleTypes.h"
 #include "core/platform/Timer.h"
 #include "core/platform/network/SocketStreamHandleClient.h"
 #include "modules/websockets/WebSocketChannel.h"
@@ -41,6 +42,7 @@
 #include "modules/websockets/WebSocketHandshake.h"
 #include "wtf/Deque.h"
 #include "wtf/Forward.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 #include "wtf/text/CString.h"
@@ -59,6 +61,9 @@ class MainThreadWebSocketChannel : public RefCounted<MainThreadWebSocketChannel>
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassRefPtr<MainThreadWebSocketChannel> create(Document* document, WebSocketChannelClient* client) { return adoptRef(new MainThreadWebSocketChannel(document, client)); }
+    // You can use this create function if you want to specify the source file and the line number information
+    // at the connection initiation manually.
+    static PassRefPtr<MainThreadWebSocketChannel> create(Document* document, WebSocketChannelClient* client, const ScriptCallFrame& frame) { return adoptRef(new MainThreadWebSocketChannel(document, client, frame)); }
     virtual ~MainThreadWebSocketChannel();
 
     bool send(const char* data, int length);
@@ -74,7 +79,8 @@ public:
     // Start closing handshake. Use the CloseEventCodeNotSpecified for the code
     // argument to omit payload.
     virtual void close(int code, const String& reason) OVERRIDE;
-    virtual void fail(const String& reason) OVERRIDE;
+    virtual void fail(const String& reason, MessageLevel) OVERRIDE;
+    virtual void fail(const String& reason, MessageLevel, PassOwnPtr<CallStackWrapper>) OVERRIDE;
     virtual void disconnect() OVERRIDE;
 
     virtual void suspend() OVERRIDE;
@@ -104,6 +110,7 @@ protected:
 
 private:
     MainThreadWebSocketChannel(Document*, WebSocketChannelClient*);
+    MainThreadWebSocketChannel(Document*, WebSocketChannelClient*, const ScriptCallFrame&);
 
     bool appendToBuffer(const char* data, size_t len);
     void skipBuffer(size_t len);
@@ -111,6 +118,7 @@ private:
     void resumeTimerFired(Timer<MainThreadWebSocketChannel>*);
     void startClosingHandshake(int code, const String& reason);
     void closingTimerFired(Timer<MainThreadWebSocketChannel>*);
+    void failInternal();
 
     bool processFrame();
 
@@ -139,6 +147,7 @@ private:
     void enqueueRawFrame(WebSocketFrame::OpCode, const char* data, size_t dataLength);
     void enqueueBlobFrame(WebSocketFrame::OpCode, const Blob&);
 
+    void failAsError(const String& reason) { fail(reason, ErrorMessageLevel); }
     void processOutgoingFrameQueue();
     void abortOutgoingFrameQueue();