Add an API to component_updater that asks to do an update check "now".

chrome/browser/component_updater/component_updater_service.h

Index: chrome/browser/component_updater/component_updater_service.h
diff --git a/chrome/browser/component_updater/component_updater_service.h b/chrome/browser/component_updater/component_updater_service.h
index 43a083f933acdfbcd0bc34575263eb8563b85d7e..94caebfeafb064bf7cb6afc6297834a828e19247 100644
--- a/chrome/browser/component_updater/component_updater_service.h
+++ b/chrome/browser/component_updater/component_updater_service.h
@@ -88,6 +88,7 @@ class ComponentUpdateService {
   enum Status {
     kOk,
     kReplaced,
+    kInProgress,
     kError
   };
   // Controls the component updater behavior.
@@ -139,6 +140,12 @@ class ComponentUpdateService {
   // before calling Start().
   virtual Status RegisterComponent(const CrxComponent& component) = 0;
 
+  // Ask the component updater to do an update check for a previously
+  // registered component, soon. Only one client may request for this
+  // higher priority treatment at one time. Returns |kInProgress| if
+  // there is already a request in progress
+  virtual Status CheckForUpdateSoon(const CrxComponent& component) = 0;
+
   virtual ~ComponentUpdateService() {}
 };
 
@@ -148,4 +155,3 @@ ComponentUpdateService* ComponentUpdateServiceFactory(
     ComponentUpdateService::Configurator* config);
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
-