Set default for prefs::kGCMChannelEnabled to true on all channels

GCMProfileService tweaks the default value of prefs::kGCMChannelEnabled
so that GCM is enabled by default on the canary/dev/custom channels only.
However, the code that uses this pref has been broken for three months
now (since http://crrev.com/253787) so that it completely ignores the
default pref value. Hence, there is no need to tweak the default.

BUG=376746
TEST=Manual

Review URL: https://codereview.chromium.org/301433002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272669 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/services/gcm/gcm_profile_service.cc

@@ -15,7 +15,6 @@
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/common/chrome_constants.h"
-#include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 #include "components/gcm_driver/gcm_client_factory.h"
 #include "components/pref_registry/pref_registry_syncable.h"
@@ -63,17 +62,9 @@ std::string GCMProfileService::GetGCMEnabledStateString(GCMEnabledState state) {
 // static
 void GCMProfileService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  // GCM support is only enabled by default for Canary/Dev/Custom builds.
-  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
-  bool on_by_default = false;
-  if (channel == chrome::VersionInfo::CHANNEL_UNKNOWN ||
-      channel == chrome::VersionInfo::CHANNEL_CANARY ||
-      channel == chrome::VersionInfo::CHANNEL_DEV) {
-    on_by_default = true;
-  }
   registry->RegisterBooleanPref(
       prefs::kGCMChannelEnabled,
-      on_by_default,
+      true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }