Change Read size to a size_t for clarity

media/filters/ffmpeg_glue_unittest.cc

 // Copyright (c) 2011 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/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/mock_filters.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_glue.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::DoAll;
 using ::testing::InSequence;
 using ::testing::Return;
 using ::testing::SetArgumentPointee;
 using ::testing::StrictMock;
 
 namespace media {
 
 class MockProtocol : public FFmpegURLProtocol {
  public:
   MockProtocol() {
   }
 
-  MOCK_METHOD2(Read, int(int size, uint8* data));
+  MOCK_METHOD2(Read, size_t(size_t size, uint8* data));
   MOCK_METHOD1(GetPosition, bool(int64* position_out));
   MOCK_METHOD1(SetPosition, bool(int64 position));
   MOCK_METHOD1(GetSize, bool(int64* size_out));
   MOCK_METHOD0(IsStreaming, bool());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockProtocol);
 };
 
 class FFmpegGlueTest : public ::testing::Test {
@@ skipping 277 matching lines @@
 
   // Remove our own reference, we shouldn't be destroyed yet.
   CheckPoint(0);
   protocol.reset();
 
   // ~FFmpegGlue() will be called when this unit test finishes execution.  By
   // leaving something inside FFmpegGlue's map we get to test our cleanup code.
 }
 
 }  // namespace media