app_list: Drive app integration.

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index 665d3643e97aac1e46971c35c310648bd4a0e16f..37767b87510c3c19cae6e879c7759dde856d29fe 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -203,6 +203,10 @@ const char kPrefNextStorageThreshold[] = "next_storage_threshold";
 // extension or app consumes excessive disk space.
 const char kPrefDisableStorageNotifications[] = "disable_storage_notifications";
 
+// A boolean preference that indicates whether the extension should not be
+// synced. Default value is false.
+const char kPrefDoNotSync[] = "do_not_sync";
+
 // Provider of write access to a dictionary storing extension prefs.
 class ScopedExtensionPrefUpdate : public DictionaryPrefUpdate {
  public:
@@ -1743,6 +1747,14 @@ base::Time ExtensionPrefs::GetInstallTime(
   return base::Time::FromInternalValue(install_time_i64);
 }
 
+bool ExtensionPrefs::IsSyncable(const std::string& extension_id) const {

[not at google - send to devlin, 2014/06/06 19:37:16]

i'd mildly prefer this to reflect the actual preference being stored (DoNotSync)
but not a big deal.

[xiyuan, 2014/06/09 20:59:59]

Done.

+  bool do_not_sync;
+  if (!ReadPrefAsBoolean(extension_id, kPrefDoNotSync, &do_not_sync))
+    return true;
+
+  return !do_not_sync;
+}
+
 base::Time ExtensionPrefs::GetLastLaunchTime(
     const std::string& extension_id) const {
   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
@@ -2165,6 +2177,10 @@ void ExtensionPrefs::PopulateExtensionInfoPrefs(
     extension_dict->Set(kPrefManifest,
                         extension->manifest()->value()->DeepCopy());
   }
+
+  // Only writes kPrefDoNotSync when it is not the default.
+  if (!extension->is_syncable())
+    extension_dict->Set(kPrefDoNotSync, new base::FundamentalValue(true));
 }
 
 void ExtensionPrefs::InitExtensionControlledPrefs(