Provide monitoring of usage for a storage type and origin

webkit/browser/quota/storage_observer.cc

Index: webkit/browser/quota/storage_observer.cc
diff --git a/webkit/browser/quota/storage_observer.cc b/webkit/browser/quota/storage_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..afed13fa9932ebdba027efa20b3cad6a9f230404
--- /dev/null
+++ b/webkit/browser/quota/storage_observer.cc
@@ -0,0 +1,65 @@
+// Copyright 2014 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 "webkit/browser/quota/storage_observer.h"
+
+namespace quota {
+
+// StorageObserver::Filter
+
+StorageObserver::Filter::Filter()
+    : storage_type(kStorageTypeUnknown) {
+}
+
+StorageObserver::Filter::Filter(StorageType storage_type, const GURL& origin)
+    : storage_type(storage_type), origin(origin) {
+}
+
+bool StorageObserver::Filter::operator==(const Filter& other) const {
+  return storage_type == other.storage_type &&
+         origin == other.origin;
+}
+
+// StorageObserver::MonitorParams
+
+StorageObserver::MonitorParams::MonitorParams()
+    : rate(0), dispatch_initial_state(false) {
+}
+
+StorageObserver::MonitorParams::MonitorParams(
+    StorageType storage_type,
+    const GURL& origin,
+    int rate,
+    bool get_initial_state)
+        : filter(storage_type, origin),
+          rate(rate),
+          dispatch_initial_state(get_initial_state) {
+}
+
+StorageObserver::MonitorParams::MonitorParams(
+    const Filter& filter,
+    int rate,
+    bool get_initial_state)
+        : filter(filter),
+          rate(rate),
+          dispatch_initial_state(get_initial_state) {
+}
+
+// StorageObserver::Event
+
+StorageObserver::Event::Event()
+    : usage(0), quota(0) {
+}
+
+StorageObserver::Event::Event(const Filter& filter, int64 usage, int64 quota)
+    : filter(filter), usage(usage), quota(quota) {
+}
+
+bool StorageObserver::Event::operator==(const Event& other) const {
+  return filter == other.filter &&
+         usage == other.usage &&
+         quota == other.quota;
+}
+
+}  // namespace quota