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

base/pickle.h

 // Copyright (c) 2012 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 BASE_PICKLE_H_
 #define BASE_PICKLE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 114 matching lines @@
   void AddUInt16() { return AddPOD<uint16_t>(); }
   void AddUInt32() { return AddPOD<uint32_t>(); }
   void AddInt64() { return AddPOD<int64_t>(); }
   void AddUInt64() { return AddPOD<uint64_t>(); }
   void AddFloat() { return AddPOD<float>(); }
   void AddDouble() { return AddPOD<double>(); }
   void AddString(const StringPiece& value);
   void AddString16(const StringPiece16& value);
   void AddData(int length);
   void AddBytes(int length);
+  void AddAttachment();
 
  private:
   // Just like AddBytes() but with a compile-time size for performance.
   template<size_t length> void BASE_EXPORT AddBytesStatic();
 
   template <typename T>
   void AddPOD() { AddBytesStatic<sizeof(T)>(); }
 
   size_t payload_size_ = 0;
 };
@@ skipping 230 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(PickleTest, PeekNext);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, PeekNextOverflow);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, FindNext);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, FindNextWithIncompleteHeader);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, FindNextOverflow);
 };
 
 }  // namespace base
 
 #endif  // BASE_PICKLE_H_