Try to fix 10.6 build after clang revert.

content/renderer/render_view_browsertest_mac.mm

Index: content/renderer/render_view_browsertest_mac.mm
diff --git a/content/renderer/render_view_browsertest_mac.mm b/content/renderer/render_view_browsertest_mac.mm
index dfb70b00ff04ee114b6c86d088586ce29fe50938..0ec72303f21ea187ebedf44d4e0b41533e74c8be 100644
--- a/content/renderer/render_view_browsertest_mac.mm
+++ b/content/renderer/render_view_browsertest_mac.mm
@@ -26,7 +26,11 @@ NSEvent* CmdDeadKeyEvent(NSEventType type, unsigned short code) {
     default:
       CHECK(false);
   }
+  // TODO(thakis): Remove this once clang is smarter, http://crbug.com/111861
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wformat"
   NSString* s = [NSString stringWithFormat:@"%C", uniChar];
+#pragma clang diagnostic pop
 
   return [NSEvent keyEventWithType:type
                           location:NSMakePoint(0, 0)