Revert of Simplify ppapi Graphics3D size propagation a bit

ppapi/thunk/ppb_graphics_3d_api.h

Index: ppapi/thunk/ppb_graphics_3d_api.h
diff --git a/ppapi/thunk/ppb_graphics_3d_api.h b/ppapi/thunk/ppb_graphics_3d_api.h
index 8d590ec9e64bad8118db989a6720fb6ba7e7bb9b..9c2e31228df20bd8c1aa605605948fb7fea05f31 100644
--- a/ppapi/thunk/ppb_graphics_3d_api.h
+++ b/ppapi/thunk/ppb_graphics_3d_api.h
@@ -12,10 +12,6 @@
 #include "ppapi/c/dev/ppb_gles_chromium_texture_mapping_dev.h"
 #include "ppapi/c/ppb_graphics_3d.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
-
-namespace gfx {
-class Size;
-}
 
 namespace gpu {
 struct SyncToken;
@@ -40,7 +36,8 @@
   virtual int32_t SwapBuffersWithSyncToken(
       scoped_refptr<TrackedCallback> callback,
       const gpu::SyncToken& sync_token,
-      const gfx::Size& size) = 0;
+      int32_t width,
+      int32_t height) = 0;
   virtual int32_t GetAttribMaxValue(int32_t attribute, int32_t* value) = 0;
 
   // Graphics3DTrusted API.