Rename BASE_API to BASE_EXPORT.

base/threading/platform_thread.h

Index: base/threading/platform_thread.h
===================================================================
--- base/threading/platform_thread.h	(revision 95578)
+++ base/threading/platform_thread.h	(working copy)
@@ -10,7 +10,7 @@
 #define BASE_THREADING_PLATFORM_THREAD_H_
 #pragma once
 
-#include "base/base_api.h"
+#include "base/base_export.h"
 #include "base/basictypes.h"
 #include "build/build_config.h"
 
@@ -55,11 +55,11 @@
 };
 
 // A namespace for low-level thread functions.
-class BASE_API PlatformThread {
+class BASE_EXPORT PlatformThread {
  public:
   // Implement this interface to run code on a background thread.  Your
   // ThreadMain method will be called on the newly created thread.
-  class BASE_API Delegate {
+  class BASE_EXPORT Delegate {
    public:
     virtual ~Delegate() {}
     virtual void ThreadMain() = 0;