Remove "base/values.h" import from "base/location.h", fix up downstream files.

chrome/browser/extensions/extension_prefs_unittest.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_EXTENSION_PREFS_UNITTEST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_UNITTEST_H_
 #pragma once
 
 #include "base/message_loop.h"
 #include "chrome/browser/extensions/test_extension_prefs.h"
 #include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace base {
+class Value;
+}
+
 // Base class for extension preference-related unit tests.
 class ExtensionPrefsTest : public testing::Test {
  public:
   ExtensionPrefsTest();
   virtual ~ExtensionPrefsTest();
 
   // This function will get called once, and is the right place to do operations
   // on ExtensionPrefs that write data.
   virtual void Initialize() = 0;
 
@@ skipping 24 matching lines @@
 
 class ExtensionPrefsPrepopulatedTest : public ExtensionPrefsTest {
  public:
   ExtensionPrefsPrepopulatedTest();
   virtual ~ExtensionPrefsPrepopulatedTest();
 
   virtual void RegisterPreferences() OVERRIDE;
 
   void InstallExtControlledPref(Extension *ext,
                                 const std::string& key,
-                                Value* val);
+                                base::Value* val);
 
   void InstallExtControlledPrefIncognito(Extension *ext,
                                          const std::string& key,
-                                         Value* val);
+                                         base::Value* val);
 
   void InstallExtControlledPrefIncognitoSessionOnly(
       Extension *ext,
       const std::string& key,
-      Value* val);
+      base::Value* val);
 
   void InstallExtension(Extension *ext);
 
   void UninstallExtension(const std::string& extension_id);
 
   // Weak references, for convenience.
   Extension* ext1_;
   Extension* ext2_;
   Extension* ext3_;
   Extension* ext4_;
 
   // Flags indicating whether each of the extensions has been installed, yet.
   bool installed[4];
 
  private:
   void EnsureExtensionInstalled(Extension *ext);
 
   void EnsureExtensionUninstalled(const std::string& extension_id);
 
   scoped_refptr<Extension> ext1_scoped_;
   scoped_refptr<Extension> ext2_scoped_;
   scoped_refptr<Extension> ext3_scoped_;
   scoped_refptr<Extension> ext4_scoped_;
 };
 
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_UNITTEST_H_