Move WebMIMERegistry impl from //content to blink:platform/network/mime

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 137 matching lines @@
   // 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.
-  virtual WebMimeRegistry* mimeRegistry() { return nullptr; }
+  virtual WebMimeRegistry* mimeRegistry();
 
   // May return null if sandbox support is not necessary
   virtual WebSandboxSupport* sandboxSupport() { return nullptr; }
 
   // May return null on some platforms.
   virtual WebThemeEngine* themeEngine() { return nullptr; }
 
   virtual WebFallbackThemeEngine* fallbackThemeEngine() { return nullptr; }
 
   // May return null.
@@ skipping 510 matching lines @@
  protected:
   Platform();
   virtual ~Platform() {}
 
   WebThread* m_mainThread;
 };
 
 }  // namespace blink
 
 #endif