Modified the pepper file chooser API to support filtering files by extensions.

ppapi/proxy/resource_creation_proxy.cc

Index: ppapi/proxy/resource_creation_proxy.cc
diff --git a/ppapi/proxy/resource_creation_proxy.cc b/ppapi/proxy/resource_creation_proxy.cc
index 064410e8e77cd9aebdf79460bb5ed5755f0fc498..41a6c7c493c7c3ff3ec00146d7703e8cadfb33c4 100644
--- a/ppapi/proxy/resource_creation_proxy.cc
+++ b/ppapi/proxy/resource_creation_proxy.cc
@@ -223,9 +223,9 @@ PP_Resource ResourceCreationProxy::CreateDirectoryReader(
 PP_Resource ResourceCreationProxy::CreateFileChooser(
     PP_Instance instance,
     PP_FileChooserMode_Dev mode,
-    const char* accept_mime_types) {
+    const char* accept_types) {
   return PPB_FileChooser_Proxy::CreateProxyResource(instance, mode,
-                                                    accept_mime_types);
+                                                    accept_types);
 }
 
 PP_Resource ResourceCreationProxy::CreateFlashMenu(