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

chrome/browser/extensions/extension_prefs_unittest.h

Index: chrome/browser/extensions/extension_prefs_unittest.h
diff --git a/chrome/browser/extensions/extension_prefs_unittest.h b/chrome/browser/extensions/extension_prefs_unittest.h
index 926a9576f977d402f1aa81e2bdb3cd3896022f90..bda1dca17241632c0f426837d4073d3cb2f2b129 100644
--- a/chrome/browser/extensions/extension_prefs_unittest.h
+++ b/chrome/browser/extensions/extension_prefs_unittest.h
@@ -11,6 +11,10 @@
 #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:
@@ -55,16 +59,16 @@ class ExtensionPrefsPrepopulatedTest : public ExtensionPrefsTest {
 
   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);