Apps&Extensions for supervised users: Add Extension::WAS_INSTALLED_BY_CUSTODIAN flag and proto entry

chrome/browser/extensions/extension_sync_data.h

Index: chrome/browser/extensions/extension_sync_data.h
diff --git a/chrome/browser/extensions/extension_sync_data.h b/chrome/browser/extensions/extension_sync_data.h
index 9165e7547b1b159fc0dece7ade1a0be7e8313472..1e924ddf2c443de6f5ad392af98ff1d62a11e35a 100644
--- a/chrome/browser/extensions/extension_sync_data.h
+++ b/chrome/browser/extensions/extension_sync_data.h
@@ -58,6 +58,7 @@ class ExtensionSyncData {
   bool enabled() const { return enabled_; }
   bool incognito_enabled() const { return incognito_enabled_; }
   bool remote_install() const { return remote_install_; }
+  bool installed_by_custodian() const { return installed_by_custodian_; }
 
   // Version-dependent properties (i.e., should be used only when the
   // version of the currenty-installed extension matches |version|).
@@ -75,6 +76,7 @@ class ExtensionSyncData {
   bool enabled_;
   bool incognito_enabled_;
   bool remote_install_;
+  bool installed_by_custodian_;
   Version version_;
   GURL update_url_;
   std::string name_;