Add comment to PPB_MouseInputEvent version 1.1 that GetMovement hasn't been supported.

ppapi/thunk/thunk.h

Index: ppapi/thunk/thunk.h
diff --git a/ppapi/thunk/thunk.h b/ppapi/thunk/thunk.h
index 2871ffff85bc1f7835464c150dca12fec729d41f..7551ea797364f5b41a2857641deb06c579d16a30 100644
--- a/ppapi/thunk/thunk.h
+++ b/ppapi/thunk/thunk.h
@@ -41,8 +41,8 @@ struct PPB_Instance_Private;
 struct PPB_KeyboardInputEvent;
 struct PPB_LayerCompositor_Dev;
 struct PPB_Messaging;
-struct PPB_MouseInputEvent_1_0;
 struct PPB_MouseInputEvent;
+struct PPB_MouseInputEvent_Dev;
 struct PPB_QueryPolicy_Dev;
 struct PPB_Scrollbar_0_5_Dev;
 struct PPB_Surface3D_Dev;
@@ -105,10 +105,9 @@ PPAPI_THUNK_EXPORT const PPB_LayerCompositor_Dev*
     GetPPB_LayerCompositor_Thunk();
 PPAPI_THUNK_EXPORT const PPB_QueryPolicy_Dev* GetPPB_QueryPolicy_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Messaging* GetPPB_Messaging_Thunk();
-PPAPI_THUNK_EXPORT const PPB_MouseInputEvent_1_0*
-    GetPPB_MouseInputEvent_1_0_Thunk();
-PPAPI_THUNK_EXPORT const PPB_MouseInputEvent*
-    GetPPB_MouseInputEvent_1_1_Thunk();
+PPAPI_THUNK_EXPORT const PPB_MouseInputEvent* GetPPB_MouseInputEvent_Thunk();
+PPAPI_THUNK_EXPORT const PPB_MouseInputEvent_Dev*
+    GetPPB_MouseInputEvent_Dev_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Scrollbar_0_5_Dev* GetPPB_Scrollbar_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Surface3D_Dev* GetPPB_Surface3D_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Transport_Dev* GetPPB_Transport_Thunk();