Add console message levels to test expectation output.

Source/testing/runner/WebTestProxy.cpp

Index: Source/testing/runner/WebTestProxy.cpp
diff --git a/Source/testing/runner/WebTestProxy.cpp b/Source/testing/runner/WebTestProxy.cpp
index 64a2c24ef136196ebb5da0d4e8c4897d44e08a69..b283c20be3dd90fa67865f816cb235cde4f2405c 100644
--- a/Source/testing/runner/WebTestProxy.cpp
+++ b/Source/testing/runner/WebTestProxy.cpp
@@ -1413,7 +1413,22 @@ void WebTestProxyBase::didAddMessageToConsole(const WebConsoleMessage& message,
     // This matches win DumpRenderTree's UIDelegate.cpp.
     if (!m_logConsoleOutput)
         return;
-    m_delegate->printMessage(string("CONSOLE MESSAGE: "));
+    string level;
+    switch (message.level) {
+    case WebConsoleMessage::LevelDebug:
+        level = "DEBUG";
+        break;
+    case WebConsoleMessage::LevelLog:
+        level = "LOG";

[jochen (gone - plz use gerrit), 2013/10/10 09:44:43]

maybe use MESSAGE here to minimize the number of tests you need to rebase?

+        break;
+    case WebConsoleMessage::LevelWarning:
+        level = "WARNING";
+        break;
+    case WebConsoleMessage::LevelError:
+        level = "ERROR";
+        break;
+    }
+    m_delegate->printMessage(string("CONSOLE ") + level + ": ");
     if (sourceLine) {
         char buffer[40];
         snprintf(buffer, sizeof(buffer), "line %d: ", sourceLine);