Track the active ExtensionKeybindingRegistry and make it available to EventRewriter.

chrome/browser/extensions/extension_keybinding_registry_tracker.cc

+// 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 "chrome/browser/extensions/extension_keybinding_registry_tracker.h"
+
+#include "base/lazy_instance.h"
+
+namespace extensions {
+
+static base::LazyInstance<BrowserContextKeyedAPIFactory<
+    ExtensionKeybindingRegistryTracker> > g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+BrowserContextKeyedAPIFactory<ExtensionKeybindingRegistryTracker>*
+ExtensionKeybindingRegistryTracker::GetFactoryInstance() {
+  return g_factory.Pointer();
+}
+
+// static
+ExtensionKeybindingRegistryTracker* ExtensionKeybindingRegistryTracker::Get(
+    content::BrowserContext* context) {
+  return BrowserContextKeyedAPIFactory<ExtensionKeybindingRegistryTracker>::Get(
+      context);
+}
+
+ExtensionKeybindingRegistryTracker::ExtensionKeybindingRegistryTracker(
+    content::BrowserContext* context)
+    : browser_context_(context), registry_(NULL) {
+}
+
+ExtensionKeybindingRegistryTracker::~ExtensionKeybindingRegistryTracker() {
+}
+
+void ExtensionKeybindingRegistryTracker::SetActiveRegistry(
+    ExtensionKeybindingRegistry* registry) {
+  registry_ = registry;
+}
+
+ExtensionKeybindingRegistry*
+ExtensionKeybindingRegistryTracker::GetActiveRegistry() {
+  return registry_;
+}
+
+}  // namespace extensions