Create a PrefStore in support of Blimp metrics collection.

android_webview/browser/aw_pref_store.cc

Index: android_webview/browser/aw_pref_store.cc
diff --git a/android_webview/browser/aw_pref_store.cc b/android_webview/browser/aw_pref_store.cc
deleted file mode 100644
index b245656b8c7f034d24e8644e50e0940e90652280..0000000000000000000000000000000000000000
--- a/android_webview/browser/aw_pref_store.cc
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright (c) 2013 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 "android_webview/browser/aw_pref_store.h"
-
-#include <memory>
-#include <utility>
-
-#include "base/values.h"
-
-AwPrefStore::AwPrefStore() {}
-
-AwPrefStore::~AwPrefStore() {}
-
-bool AwPrefStore::GetValue(const std::string& key,
-                           const base::Value** value) const {
-  return prefs_.GetValue(key, value);
-}
-
-bool AwPrefStore::GetMutableValue(const std::string& key,
-                                  base::Value** value) {
-  return prefs_.GetValue(key, value);
-}
-
-void AwPrefStore::AddObserver(PrefStore::Observer* observer) {
-  observers_.AddObserver(observer);
-}
-
-void AwPrefStore::RemoveObserver(PrefStore::Observer* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-bool AwPrefStore::HasObservers() const {
-  return observers_.might_have_observers();
-}
-
-bool AwPrefStore::IsInitializationComplete() const {
-  return true;
-}
-
-void AwPrefStore::SetValue(const std::string& key,
-                           std::unique_ptr<base::Value> value,
-                           uint32_t flags) {
-  DCHECK(value);
-  if (prefs_.SetValue(key, std::move(value)))
-    ReportValueChanged(key, flags);
-}
-
-void AwPrefStore::SetValueSilently(const std::string& key,
-                                   std::unique_ptr<base::Value> value,
-                                   uint32_t flags) {
-  prefs_.SetValue(key, std::move(value));
-}
-
-void AwPrefStore::RemoveValue(const std::string& key, uint32_t flags) {
-  if (prefs_.RemoveValue(key))
-    ReportValueChanged(key, flags);
-}
-
-bool AwPrefStore::ReadOnly() const {
-  return false;
-}
-
-PersistentPrefStore::PrefReadError AwPrefStore::GetReadError() const {
-  return PersistentPrefStore::PREF_READ_ERROR_NONE;
-}
-
-PersistentPrefStore::PrefReadError AwPrefStore::ReadPrefs() {
-  return PersistentPrefStore::PREF_READ_ERROR_NONE;
-}
-
-void AwPrefStore::ReadPrefsAsync(ReadErrorDelegate* error_delegate_raw) {
-}
-
-void AwPrefStore::ReportValueChanged(const std::string& key, uint32_t flags) {
-  FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
-}