Generate param traits size methods for IPC files in content/ (and traits it depends on).

ui/gfx/ipc/skia/gfx_skia_param_traits.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_IPC_GFX_SKIA_PARAM_TRAITS_H_
 #define UI_GFX_IPC_GFX_SKIA_PARAM_TRAITS_H_
 
 #include <string>
 
 #include "ipc/ipc_message_utils.h"
 #include "ipc/ipc_param_traits.h"
 #include "ui/gfx/ipc/skia/gfx_skia_ipc_export.h"
 
 class SkBitmap;
 
 namespace base {
 class Pickle;
 class PickleIterator;
 }
 
 namespace gfx {
 class Transform;
 }
 
 namespace IPC {
 
 template <>
 struct GFX_SKIA_IPC_EXPORT ParamTraits<SkBitmap> {
   using param_type = SkBitmap;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template <>
 struct GFX_SKIA_IPC_EXPORT ParamTraits<gfx::Transform> {
   using param_type = gfx::Transform;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // UI_GFX_IPC_GFX_SKIA_PARAM_TRAITS_H_