Renamed DefaultPrefStore into InMemoryPrefStore because it can be used in further contexts.

chrome/browser/extensions/extension_pref_store_unittest.cc

 // Copyright (c) 2010 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.
 
 #include <string>
 #include <vector>
 
 #include "base/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_pref_store.h"
-#include "chrome/browser/prefs/default_pref_store.h"
+#include "chrome/browser/prefs/in_memory_pref_store.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/pref_value_store.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/test/testing_pref_service.h"
 #include "chrome/test/testing_pref_value_store.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace keys = extension_manifest_keys;
 
@@ skipping 307 matching lines @@
   EXPECT_EQ("val4", actual);
   EXPECT_TRUE(prefs->GetString(kPref3, &actual));
   EXPECT_EQ("val6", actual);
   EXPECT_FALSE(prefs->GetString(kPref4, &actual));
 }
 
 TEST(ExtensionPrefStoreTest, NotifyWhenNeeded) {
   using testing::Mock;
 
   TestExtensionPrefStore* eps = new TestExtensionPrefStore;
-  DefaultPrefStore* dps = new DefaultPrefStore;
+  InMemoryPrefStore* dps = new InMemoryPrefStore;
   ASSERT_TRUE(eps->ext1 != NULL);
 
   // The PrefValueStore takes ownership of the PrefStores; in this case, that's
   // only an ExtensionPrefStore. Likewise, the PrefService takes ownership of
   // the PrefValueStore and PrefNotifier.
   PrefValueStore* value_store =
       new TestingPrefValueStore(NULL, NULL, eps, NULL, NULL, NULL, dps);
   scoped_ptr<MockPrefService> pref_service(new MockPrefService(value_store));
   MockPrefNotifier* pref_notifier = new MockPrefNotifier(pref_service.get(),
       value_store);
@@ skipping 10 matching lines @@
   EXPECT_CALL(*pref_notifier, FireObservers(kPref1)).Times(0);
   eps->InstallExtensionPref(eps->ext1, kPref1,
       Value::CreateStringValue("https://www.chromium.org"));
   Mock::VerifyAndClearExpectations(pref_notifier);
 
   EXPECT_CALL(*pref_notifier, FireObservers(kPref1)).Times(2);
   eps->InstallExtensionPref(eps->ext1, kPref1,
       Value::CreateStringValue("chrome://newtab"));
   eps->UninstallExtension(eps->ext1);
 }