Move ExtensionFunction to the extensions component.

extensions/browser/extension_function.h

Index: extensions/browser/extension_function.h
diff --git a/chrome/browser/extensions/extension_function.h b/extensions/browser/extension_function.h
similarity index 98%
rename from chrome/browser/extensions/extension_function.h
rename to extensions/browser/extension_function.h
index d461c6389c6e9754d7259106cf75cc745af81ee2..c33cceff0ac55e134927def316d70dc0a5686013 100644
--- a/chrome/browser/extensions/extension_function.h
+++ b/extensions/browser/extension_function.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_
+#ifndef EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
+#define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 
 #include <list>
 #include <string>
@@ -432,4 +432,4 @@ class SyncIOThreadExtensionFunction : public IOThreadExtensionFunction {
   virtual ~SyncIOThreadExtensionFunction();
 };
 
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_
+#endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_