Add WebCore log channels support to webkit_support.

webkit/support/webkit_support.cc

Index: webkit/support/webkit_support.cc
diff --git a/webkit/support/webkit_support.cc b/webkit/support/webkit_support.cc
index 214c41736bcaac572b745e29a231f284f10c58d4..052526d93e089129da92b87f80665f5a98c03888 100644
--- a/webkit/support/webkit_support.cc
+++ b/webkit/support/webkit_support.cc
@@ -645,4 +645,9 @@ double GetForegroundTabTimerInterval() {
   return webkit_glue::kForegroundTabTimerInterval;
 }
 
+// Logging
+void EnableWebCoreLogChannels(const std::string& channels) {
+  webkit_glue::EnableWebCoreLogChannels(channels);
+}
+
 }  // namespace webkit_support