Switch to standard integer types in components/, part 3 of 4.

components/sessions/core/session_id.h

Index: components/sessions/core/session_id.h
diff --git a/components/sessions/core/session_id.h b/components/sessions/core/session_id.h
index 77b4de752088c8aebb91ae9f1042742b50dc950c..d4c2645f1e626763accdbc07493b3d63e6b5db39 100644
--- a/components/sessions/core/session_id.h
+++ b/components/sessions/core/session_id.h
@@ -5,13 +5,14 @@
 #ifndef COMPONENTS_SESSIONS_CORE_SESSION_ID_H_
 #define COMPONENTS_SESSIONS_CORE_SESSION_ID_H_
 
-#include "base/basictypes.h"
+#include <stdint.h>
+
 #include "components/sessions/core/sessions_export.h"
 
 // Uniquely identifies a tab or window for the duration of a session.
 class SESSIONS_EXPORT SessionID {
  public:
-  typedef int32 id_type;
+  typedef int32_t id_type;
 
   SessionID();
   ~SessionID() {}