Correct const accessors in base/values.(h|cc)

chrome/browser/extensions/extension_service_unittest.cc

Index: chrome/browser/extensions/extension_service_unittest.cc
diff --git a/chrome/browser/extensions/extension_service_unittest.cc b/chrome/browser/extensions/extension_service_unittest.cc
index a12bded1c765e49019107facd5bd4058cef41011..3475aa7101ea1f972a9657527542d27f09b3aa22 100644
--- a/chrome/browser/extensions/extension_service_unittest.cc
+++ b/chrome/browser/extensions/extension_service_unittest.cc
@@ -827,7 +827,7 @@ class ExtensionServiceTest
     const DictionaryValue* dict =
         prefs->GetDictionary("extensions.settings");
     ASSERT_TRUE(dict != NULL) << msg;
-    DictionaryValue* pref = NULL;
+    const DictionaryValue* pref = NULL;
     ASSERT_TRUE(dict->GetDictionary(extension_id, &pref)) << msg;
     EXPECT_TRUE(pref != NULL) << msg;
     bool val;
@@ -840,7 +840,7 @@ class ExtensionServiceTest
     const DictionaryValue* dict =
         profile_->GetPrefs()->GetDictionary("extensions.settings");
     if (dict == NULL) return false;
-    DictionaryValue* pref = NULL;
+    const DictionaryValue* pref = NULL;
     if (!dict->GetDictionary(extension_id, &pref)) {
       return false;
     }
@@ -868,7 +868,7 @@ class ExtensionServiceTest
     const DictionaryValue* dict =
         prefs->GetDictionary("extensions.settings");
     ASSERT_TRUE(dict != NULL) << msg;
-    DictionaryValue* pref = NULL;
+    const DictionaryValue* pref = NULL;
     ASSERT_TRUE(dict->GetDictionary(extension_id, &pref)) << msg;
     EXPECT_TRUE(pref != NULL) << msg;
     int val;
@@ -889,7 +889,7 @@ class ExtensionServiceTest
     const DictionaryValue* dict =
         profile_->GetPrefs()->GetDictionary("extensions.settings");
     ASSERT_TRUE(dict != NULL) << msg;
-    DictionaryValue* pref = NULL;
+    const DictionaryValue* pref = NULL;
     std::string manifest_path = extension_id + ".manifest";
     ASSERT_TRUE(dict->GetDictionary(manifest_path, &pref)) << msg;
     EXPECT_TRUE(pref != NULL) << msg;