Use suffixed {uint,int}{8,16,32,64}_t types.

webrtc/base/unixfilesystem.h

Index: webrtc/base/unixfilesystem.h
diff --git a/webrtc/base/unixfilesystem.h b/webrtc/base/unixfilesystem.h
index e2209111875e19e0c92fb646ef6ecab6cb518020..dbfbaf0a7dce9f04adae3cb8ea109a31c85ea0e2 100644
--- a/webrtc/base/unixfilesystem.h
+++ b/webrtc/base/unixfilesystem.h
@@ -107,7 +107,7 @@ class UnixFilesystem : public FilesystemInterface {
   // Get a temporary folder that is unique to the current user and application.
   bool GetAppTempFolder(Pathname* path) override;
 
-  bool GetDiskFreeSpace(const Pathname& path, int64* freebytes) override;
+  bool GetDiskFreeSpace(const Pathname& path, int64_t* freebytes) override;
 
   // Returns the absolute path of the current directory.
   Pathname GetCurrentDirectory() override;