Fix cpu/memory measurements on OS X.

chrome/browser/safe_browsing/safe_browsing_database_unittest.cc

Index: chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc b/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
index 3d244c035bdee927a41f3050e25929d81475aece..30f9de4749470e506a86596029e4519a2f4b5466 100644
--- a/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_database_unittest.cc
@@ -1078,7 +1078,12 @@ void PeformUpdate(const std::wstring& initial_db,
   Time before_time = Time::Now();
   base::ProcessHandle handle = base::Process::Current().handle();
   scoped_ptr<base::ProcessMetrics> metric(
+#if !defined(OS_MACOSX)
       base::ProcessMetrics::CreateProcessMetrics(handle));
+#else
+      // Getting stats only for the current process is enough, so NULL is fine.
+      base::ProcessMetrics::CreateProcessMetrics(handle, NULL));
+#endif
   CHECK(metric->GetIOCounters(&before));
 
   std::vector<SBListChunkRanges> lists;