Move c/b/extension/api/* into extensions namespace

chrome/browser/extensions/api/terminal/terminal_private_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_TERMINAL_TERMINAL_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TERMINAL_TERMINAL_PRIVATE_API_H_
 
 #include <string>
 
 #include "chrome/browser/extensions/extension_function.h"
 
+namespace extensions {
 // Base class for all terminalPrivate function classes. Main purpose is to run
 // permission check before calling actual function implementation.
 class TerminalPrivateFunction : public AsyncExtensionFunction {
  public:
   TerminalPrivateFunction();
 
  protected:
   virtual ~TerminalPrivateFunction();
 
   // ExtensionFunction:
@@ skipping 68 matching lines @@
  protected:
   virtual ~TerminalPrivateOnTerminalResizeFunction();
 
   virtual bool RunTerminalFunction() OVERRIDE;
 
  private:
   void OnResizeOnFileThread(pid_t pid, int width, int height);
   void RespondOnUIThread(bool success);
 };
 
+}  // namespace extensions
+
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TERMINAL_TERMINAL_PRIVATE_API_H_