Switch to standard integer types in ppapi/.

BUG=138542
[email protected]
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1548813002

Cr-Commit-Position: refs/heads/master@{#366718}
diff --git a/ppapi/shared_impl/ppb_audio_shared.h b/ppapi/shared_impl/ppb_audio_shared.h
index 31888c8..10b0500 100644
--- a/ppapi/shared_impl/ppb_audio_shared.h
+++ b/ppapi/shared_impl/ppb_audio_shared.h
@@ -5,6 +5,10 @@
 #ifndef PPAPI_SHARED_IMPL_PPB_AUDIO_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_AUDIO_SHARED_H_
 
+#include <stddef.h>
+#include <stdint.h>
+
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/sync_socket.h"