Fix cpu/memory measurements on OS X.

webkit/glue/webkitclient_impl.cc

Index: webkit/glue/webkitclient_impl.cc
diff --git a/webkit/glue/webkitclient_impl.cc b/webkit/glue/webkitclient_impl.cc
index 340a28ca2f88a2b45d68e7795151f4557172b8cb..c7673cf1c322736dab153aa6be3970638930dde1 100644
--- a/webkit/glue/webkitclient_impl.cc
+++ b/webkit/glue/webkitclient_impl.cc
@@ -318,7 +318,14 @@ WebKit::WebString WebKitClientImpl::signedPublicKeyAndChallengeString(
 size_t WebKitClientImpl::memoryUsageMB() {
   using base::ProcessMetrics;
   static ProcessMetrics* process_metrics =
+#if !defined(OS_MACOSX)
       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle());
+#else
+      // The default port provider is sufficient to get data for the current
+      // process.
+      ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
+                                           NULL);
+#endif
   DCHECK(process_metrics);
   return process_metrics->GetPagefileUsage() >> 20;
 }