Move content_shell and content_browsertests code into the content namespace.

content/test/content_browser_test.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 CONTENT_TEST_CONTENT_BROWSER_TEST_H_
 #define CONTENT_TEST_CONTENT_BROWSER_TEST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/test/browser_test.h"
 #include "content/test/browser_test_base.h"
 
-class ShellMainDelegate;
 
 namespace content {
 class Shell;
-}
+class ShellMainDelegate;
 
 class ContentBrowserTest : public BrowserTestBase {
  protected:
   ContentBrowserTest();
   virtual ~ContentBrowserTest();
 
   // testing::Test:
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
   // BrowserTestBase:
   virtual void RunTestOnMainThreadLoop() OVERRIDE;
 
   // Returns the window for the test.
-  content::Shell* shell() const { return shell_; }
+  Shell* shell() const { return shell_; }
 
  private:
-  scoped_ptr<ShellMainDelegate> shell_main_delegate_;
+   scoped_ptr<content::ShellMainDelegate> shell_main_delegate_;
 
-  content::Shell* shell_;
+  Shell* shell_;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_TEST_CONTENT_BROWSER_TEST_H_