Added PPB function to return default print settings

ppapi/proxy/ppb_instance_proxy.h

Index: ppapi/proxy/ppb_instance_proxy.h
diff --git a/ppapi/proxy/ppb_instance_proxy.h b/ppapi/proxy/ppb_instance_proxy.h
index b508a25a73346e595fe54b6b39432d4fd3a20b12..b19760ca4acd0998b00b358a8decbb1ccddf322c 100644
--- a/ppapi/proxy/ppb_instance_proxy.h
+++ b/ppapi/proxy/ppb_instance_proxy.h
@@ -87,6 +87,9 @@ class PPB_Instance_Proxy : public InterfaceProxy,
   virtual int32_t LockMouse(PP_Instance instance,
                             PP_CompletionCallback callback) OVERRIDE;
   virtual void UnlockMouse(PP_Instance instance) OVERRIDE;
+  virtual PP_Bool GetDefaultPrintSettings(
+      PP_Instance instance,
+      PP_PrintSettings_Dev* print_settings) OVERRIDE;
   virtual void SetTextInputType(PP_Instance instance,
                                 PP_TextInput_Type type) OVERRIDE;
   virtual void UpdateCaretPosition(PP_Instance instance,
@@ -153,6 +156,9 @@ class PPB_Instance_Proxy : public InterfaceProxy,
                             SerializedVarReceiveInput message);
   void OnHostMsgLockMouse(PP_Instance instance);
   void OnHostMsgUnlockMouse(PP_Instance instance);
+  void OnHostMsgGetDefaultPrintSettings(PP_Instance instance,
+                                        std::string* settings_string,
+                                        bool* result);
   void OnHostMsgSetCursor(PP_Instance instance,
                           int32_t type,
                           const ppapi::HostResource& custom_image,