Add WebSocket unittests.

Source/modules/websockets/WebSocket.cpp

Index: Source/modules/websockets/WebSocket.cpp
diff --git a/Source/modules/websockets/WebSocket.cpp b/Source/modules/websockets/WebSocket.cpp
index 5f4617538711a4378cb11722f8d29c61d8cc9e38..cf5f3175125842cebbb484694db8f843d817c800 100644
--- a/Source/modules/websockets/WebSocket.cpp
+++ b/Source/modules/websockets/WebSocket.cpp
@@ -62,8 +62,6 @@
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
 
-using namespace std;
-
 namespace WebCore {
 
 WebSocket::EventQueue::EventQueue(EventTarget* target)
@@ -173,7 +171,7 @@ static inline bool isValidSubprotocolCharacter(UChar character)
     return character >= minimumProtocolCharacter && character <= maximumProtocolCharacter && isNotSeparator;
 }
 
-static bool isValidSubprotocolString(const String& protocol)
+bool WebSocket::isValidSubprotocolString(const String& protocol)
 {
     if (protocol.isEmpty())
         return false;
@@ -211,8 +209,8 @@ static String joinStrings(const Vector<String>& strings, const char* separator)
 
 static unsigned long saturateAdd(unsigned long a, unsigned long b)
 {
-    if (numeric_limits<unsigned long>::max() - a < b)
-        return numeric_limits<unsigned long>::max();
+    if (std::numeric_limits<unsigned long>::max() - a < b)
+        return std::numeric_limits<unsigned long>::max();
     return a + b;
 }
 
@@ -319,7 +317,7 @@ void WebSocket::connect(const String& url, const Vector<String>& protocols, Exce
         return;
     }
 
-    m_channel = WebSocketChannel::create(executionContext(), this);
+    m_channel = createChannel(executionContext(), this);
 
     for (size_t i = 0; i < protocols.size(); ++i) {
         if (!isValidSubprotocolString(protocols[i])) {