Avoid using Pickle::WriteSize(), which writes an architecture-dependent amount

ui/base/clipboard/custom_data_helper_unittest.cc

Index: ui/base/clipboard/custom_data_helper_unittest.cc
===================================================================
--- ui/base/clipboard/custom_data_helper_unittest.cc	(revision 125762)
+++ ui/base/clipboard/custom_data_helper_unittest.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -118,7 +118,7 @@
   expected.push_back(ASCIIToUTF16("f"));
 
   Pickle malformed;
-  malformed.WriteSize(1000);
+  malformed.WriteUInt64(1000);
   malformed.WriteString16(ASCIIToUTF16("hello"));
   malformed.WriteString16(ASCIIToUTF16("world"));
   std::vector<string16> actual(expected);
@@ -126,7 +126,7 @@
   EXPECT_EQ(expected, actual);
 
   Pickle malformed2;
-  malformed2.WriteSize(1);
+  malformed2.WriteUInt64(1);
   malformed2.WriteString16(ASCIIToUTF16("hello"));
   std::vector<string16> actual2(expected);
   ReadCustomDataTypes(malformed2.data(), malformed2.size(), &actual2);
@@ -138,7 +138,7 @@
   std::map<string16, string16> result_map;
 
   Pickle malformed;
-  malformed.WriteSize(1000);
+  malformed.WriteUInt64(1000);
   malformed.WriteString16(ASCIIToUTF16("hello"));
   malformed.WriteString16(ASCIIToUTF16("world"));
 
@@ -151,7 +151,7 @@
   EXPECT_EQ(0u, result_map.size());
 
   Pickle malformed2;
-  malformed2.WriteSize(1);
+  malformed2.WriteUInt64(1);
   malformed2.WriteString16(ASCIIToUTF16("hello"));
 
   ReadCustomDataForType(malformed2.data(),