Delete some unused code found by -Wunused-function

ppapi/thunk/ppb_view_thunk.cc

Index: ppapi/thunk/ppb_view_thunk.cc
diff --git a/ppapi/thunk/ppb_view_thunk.cc b/ppapi/thunk/ppb_view_thunk.cc
index ea6f6245311a617f91f5d6a8ab220777ab370551..c9a88b7cf4cb3eef1a4a44206008f4a783d11844 100644
--- a/ppapi/thunk/ppb_view_thunk.cc
+++ b/ppapi/thunk/ppb_view_thunk.cc
@@ -25,14 +25,6 @@ PP_Bool IsView(PP_Resource resource) {
   return enter.succeeded() ? PP_TRUE : PP_FALSE;
 }
 
-PP_Bool GetSize(PP_Resource resource, PP_Size* size) {
-  EnterView enter(resource, true);
-  if (enter.failed() || !size)
-    return PP_FALSE;
-  *size = enter.object()->GetData().rect.size;
-  return PP_TRUE;
-}
-
 PP_Bool GetRect(PP_Resource resource, PP_Rect* viewport) {
   EnterView enter(resource, true);
   if (enter.failed() || !viewport)
@@ -63,13 +55,6 @@ PP_Bool IsPageVisible(PP_Resource resource) {
   return PP_FromBool(enter.object()->GetData().is_page_visible);
 }
 
-PP_Bool IsClipVisible(PP_Resource resource) {
-  EnterView enter(resource, true);
-  if (enter.failed())
-    return PP_FALSE;
-  return PP_FromBool(IsRectVisible(enter.object()->GetData().clip_rect));
-}
-
 PP_Bool GetClipRect(PP_Resource resource, PP_Rect* clip) {
   EnterView enter(resource, true);
   if (enter.failed() || !clip)