[WebSocket] Merge duplicated HTTP headers for devtools

Source/platform/network/WebSocketHandshakeRequest.cpp

Index: Source/platform/network/WebSocketHandshakeRequest.cpp
diff --git a/Source/platform/network/WebSocketHandshakeRequest.cpp b/Source/platform/network/WebSocketHandshakeRequest.cpp
index 1cc3f1473210654fed1406a97724fb62b3cb3777..87b8ce7ac0a949fd7b6660e2b0696f9e358623ba 100644
--- a/Source/platform/network/WebSocketHandshakeRequest.cpp
+++ b/Source/platform/network/WebSocketHandshakeRequest.cpp
@@ -47,4 +47,14 @@ WebSocketHandshakeRequest::~WebSocketHandshakeRequest()
 {
 }
 
+// static

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

We don't add "// static" comment in Blink.

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

Done.

+void WebSocketHandshakeRequest::addAndMergeHeader(HTTPHeaderMap* map, const AtomicString& name, const AtomicString& value)
+{
+    HTTPHeaderMap::AddResult result = map->add(name, value);
+    if (!result.isNewEntry) {
+        // Inspector expects the "\n" separated format.
+        result.iterator->value = result.iterator->value + "\n" + String(value);
+    }
+}
+
 } // namespace WebCore