Tighten up compile warnings based to match other chromium sub-projects....

remoting/base/multiple_array_input_stream_unittest.cc

 // Copyright (c) 2010 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.
 
 #include <string>
 
 #include "remoting/base/multiple_array_input_stream.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace remoting {
 
-static int ReadFromInput(MultipleArrayInputStream* input,
-                         void* data, int size) {
+static size_t ReadFromInput(MultipleArrayInputStream* input,
+                         void* data, size_t size) {
   uint8* out = reinterpret_cast<uint8*>(data);
   int out_size = size;
 
   const void* in;
   int in_size = 0;
 
   while (true) {
     if (!input->Next(&in, &in_size)) {
       return size - out_size;
     }
@@ skipping 61 matching lines @@
   ReadString(stream.get(), "MultipleArrayInput");
   EXPECT_TRUE(stream->Skip(6));
   ReadString(stream.get(), "f");
   ReadString(stream.get(), "o");
   ReadString(stream.get(), "r");
   ReadString(stream.get(), " ");
   ReadString(stream.get(), "Chromoting");
 }
 
 }  // namespace remoting