Push API: register PushMessagingServiceImpl as GCMAppHandler.

chrome/common/pref_names.cc

 // Copyright (c) 2012 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/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 1279 matching lines @@
 const char kPreferenceResetTime[] = "prefs.preference_reset_time";
 
 // String that indicates if the Profile Reset prompt has already been shown to
 // the user. Used both in user preferences and local state, in the latter, it is
 // actually a dictionary that maps profile keys to before-mentioned strings.
 const char kProfileResetPromptMemento[] = "profile.reset_prompt_memento";
 
 // The GCM channel's enabled state.
 const char kGCMChannelEnabled[] = "gcm.channel_enabled";
 
+// How many Service Workers are registered with the Push API (could be zero).
+const char kPushMessagingRegistrationCount[] =
+    "gcm.push_messaging_registration_count";
+
 // Whether Easy Unlock is enabled.
 extern const char kEasyUnlockEnabled[] = "easy_unlock.enabled";
 
 // Whether to show the Easy Unlock first run tutorial.
 extern const char kEasyUnlockShowTutorial[] = "easy_unlock.show_tutorial";
 
 // Preference storing Easy Unlock pairing data.
 extern const char kEasyUnlockPairing[] = "easy_unlock.pairing";
 
 // A cache of zero suggest results using JSON serialized into a string.
@@ skipping 1071 matching lines @@
 // "mapped_title" entries, detailing the bookmark target URL (if any), the title
 // given by the PartnerBookmarksProvider and either the user-visible renamed
 // title or an empty string if the bookmark node was removed.
 const char kPartnerBookmarkMappings[] = "partnerbookmarks.mappings";
 #endif
 
 // Whether DNS Quick Check is disabled in proxy resolution.
 const char kQuickCheckEnabled[] = "proxy.quick_check_enabled";
 
 }  // namespace prefs