Introduce Platform::setCurrentPlatformForTesting

third_party/WebKit/public/platform/Platform.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 120 matching lines @@
 #ifdef WIN32
     typedef HANDLE FileHandle;
 #else
     typedef int FileHandle;
 #endif
 
     static void initialize(Platform*);
     static void shutdown();
     static Platform* current();
 
+    // Used to switch the current platform only for testing.
+    static void setCurrentPlatformForTesting(Platform*);
+
     // May return null.
     virtual WebCookieJar* cookieJar() { return nullptr; }
 
     // Must return non-null.
     virtual WebClipboard* clipboard() { return nullptr; }
 
     // Must return non-null.
     virtual WebFileUtilities* fileUtilities() { return nullptr; }
 
     // Must return non-null.
@@ skipping 461 matching lines @@
 protected:
     Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif