[WebSocket] Merge duplicated HTTP headers for devtools

Source/platform/network/WebSocketHandshakeRequest.h

Index: Source/platform/network/WebSocketHandshakeRequest.h
diff --git a/Source/platform/network/WebSocketHandshakeRequest.h b/Source/platform/network/WebSocketHandshakeRequest.h
index 87786fb8a0250fea3b743379b23cd467f2237591..21adb966a71f1db50d2f0a59e44ca56a8955f126 100644
--- a/Source/platform/network/WebSocketHandshakeRequest.h
+++ b/Source/platform/network/WebSocketHandshakeRequest.h
@@ -31,6 +31,7 @@
 #ifndef WebSocketHandshakeRequest_h
 #define WebSocketHandshakeRequest_h
 
+#include "platform/network/HTTPHeaderMap.h"

[tkent, 2014/01/14 00:25:14]

Do we need to include this?

[yhirano, 2014/01/14 01:17:04]

Done.

 #include "platform/network/HTTPRequest.h"
 
 namespace WebCore {
@@ -41,6 +42,13 @@ public:
     static PassRefPtr<WebSocketHandshakeRequest> create() { return adoptRef(new WebSocketHandshakeRequest); }
     ~WebSocketHandshakeRequest();
 
+    void addAndMergeHeader(const AtomicString& name, const AtomicString& value) { addAndMergeHeader(&m_headerFields, name, value); }
+
+    // Merges the existing value with |value| in |map| if |map| already has |name|.
+    // Associates |value| with |name| in |map| otherwise.
+    // This function builds data for inspector.
+    static void addAndMergeHeader(HTTPHeaderMap* /* map */, const AtomicString& name, const AtomicString& value);
+
 private:
     WebSocketHandshakeRequest(const String& requestMethod, const KURL&);
     WebSocketHandshakeRequest();