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

ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h b/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h
index e0d17a1be2d84731d68e9b8b353c740516228bfc..262e9035c41cb713f16141c64afba801e8e7e27c 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h
+++ b/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.h
@@ -11,6 +11,7 @@
 #include "ppapi/c/dev/ppb_fullscreen_dev.h"
 #include "ppapi/c/dev/ppb_graphics_3d_dev.h"
 #include "ppapi/c/dev/ppb_graphics_3d_trusted_dev.h"
+#include "ppapi/c/dev/ppb_input_event_dev.h"
 #include "ppapi/c/dev/ppb_memory_dev.h"
 #include "ppapi/c/dev/ppb_scrollbar_dev.h"
 #include "ppapi/c/dev/ppb_testing_dev.h"
@@ -114,6 +115,7 @@ const PPB_Instance* PPBInstanceInterface();
 const PPB_KeyboardInputEvent* PPBKeyboardInputEventInterface();
 const PPB_Memory_Dev* PPBMemoryInterface();  // shared
 const PPB_MouseInputEvent* PPBMouseInputEventInterface();
+const PPB_MouseInputEvent_Dev* PPBMouseInputEventDevInterface();
 const PPB_Messaging* PPBMessagingInterface();
 const PPB_PDF* PPBPDFInterface();
 const PPB_Scrollbar_Dev* PPBScrollbarInterface();