Replace size_t with int in a few media classes.

media/base/data_buffer_unittest.cc

 // 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.
 
 #include "base/string_util.h"
 #include "media/base/data_buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 TEST(DataBufferTest, Constructors) {
-  const size_t kTestSize = 10;
+  const int kTestSize = 10;
 
   scoped_refptr<DataBuffer> buffer(new DataBuffer(0));
   EXPECT_FALSE(buffer->GetData());
 
   scoped_refptr<DataBuffer> buffer2(new DataBuffer(kTestSize));
-  EXPECT_EQ(0u, buffer2->GetDataSize());
+  EXPECT_EQ(0, buffer2->GetDataSize());
   EXPECT_EQ(kTestSize, buffer2->GetBufferSize());
 }
 
 TEST(DataBufferTest, ReadingWriting) {
   const char kData[] = "hello";
-  const size_t kDataSize = arraysize(kData);
+  const int kDataSize = arraysize(kData);
   const char kNewData[] = "chromium";
-  const size_t kNewDataSize = arraysize(kNewData);
+  const int kNewDataSize = arraysize(kNewData);
 
   // Create a DataBuffer.
   scoped_refptr<DataBuffer> buffer(new DataBuffer(kDataSize));
   ASSERT_TRUE(buffer);
 
   uint8* data = buffer->GetWritableData();
   ASSERT_TRUE(data);
   ASSERT_EQ(kDataSize, buffer->GetBufferSize());
   memcpy(data, kData, kDataSize);
   buffer->SetDataSize(kDataSize);
   const uint8* read_only_data = buffer->GetData();
   ASSERT_EQ(data, read_only_data);
   ASSERT_EQ(0, memcmp(read_only_data, kData, kDataSize));
   EXPECT_FALSE(buffer->IsEndOfStream());
 
   scoped_refptr<DataBuffer> buffer2(new DataBuffer(kNewDataSize + 10));
   data = buffer2->GetWritableData();
   ASSERT_TRUE(data);
   ASSERT_EQ(kNewDataSize + 10, buffer2->GetBufferSize());
   memcpy(data, kNewData, kNewDataSize);
   buffer2->SetDataSize(kNewDataSize);
   read_only_data = buffer2->GetData();
   EXPECT_EQ(kNewDataSize, buffer2->GetDataSize());
   ASSERT_EQ(data, read_only_data);
   EXPECT_EQ(0, memcmp(read_only_data, kNewData, kNewDataSize));
 }
 
 }  // namespace media