Change ChunkDemuxerStream/SourceBufferStream memory limit to size_t type

media/filters/source_buffer_platform.h

Index: media/filters/source_buffer_platform.h
diff --git a/media/filters/source_buffer_platform.h b/media/filters/source_buffer_platform.h
index b063f99a5e408d1cf6ebf89ee8580b78d1bc9728..7feb05bff97c3eea95dfdb46b5c9f45c04f7a4a7 100644
--- a/media/filters/source_buffer_platform.h
+++ b/media/filters/source_buffer_platform.h
@@ -5,13 +5,14 @@
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_PLATFORM_H_
 #define MEDIA_FILTERS_SOURCE_BUFFER_PLATFORM_H_
 
+#include "base/basictypes.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // The maximum amount of data in bytes the stream will keep in memory.
-MEDIA_EXPORT extern const int kSourceBufferAudioMemoryLimit;
-MEDIA_EXPORT extern const int kSourceBufferVideoMemoryLimit;
+MEDIA_EXPORT extern const size_t kSourceBufferAudioMemoryLimit;
+MEDIA_EXPORT extern const size_t kSourceBufferVideoMemoryLimit;
 
 }  // namespace media