Try to fix 10.6 build after clang revert.

webkit/plugins/npapi/plugin_web_event_converter_mac.mm

Index: webkit/plugins/npapi/plugin_web_event_converter_mac.mm
diff --git a/webkit/plugins/npapi/plugin_web_event_converter_mac.mm b/webkit/plugins/npapi/plugin_web_event_converter_mac.mm
index f0ac8f7aeefa4ffbbf7d1987ebd142622bbd4354..928cacee04b4ee8add75846f6ba6b8befb67e1e1 100644
--- a/webkit/plugins/npapi/plugin_web_event_converter_mac.mm
+++ b/webkit/plugins/npapi/plugin_web_event_converter_mac.mm
@@ -209,11 +209,15 @@ bool CocoaPluginWebEventConverter::ConvertKeyboardEvent(
     return true;
   }
 
+  // TODO(thakis): Remove this once clang is smarter, http://crbug.com/111861
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wformat"
   cocoa_event_.data.key.characters = reinterpret_cast<NPNSString*>(
       [NSString stringWithFormat:@"%S", key_event.text]);
   cocoa_event_.data.key.charactersIgnoringModifiers =
       reinterpret_cast<NPNSString*>(
           [NSString stringWithFormat:@"%S", key_event.unmodifiedText]);
+#pragma clang diagnostic pop
 
   if (key_event.modifiers & WebInputEvent::IsAutoRepeat)
     cocoa_event_.data.key.isARepeat = true;