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

chrome/browser/component_updater/component_updater_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 70 matching lines @@
 // During the normal operation of the component updater some specific
 // notifications are fired, like COMPONENT_UPDATER_STARTED and
 // COMPONENT_UPDATE_FOUND. See notification_type.h for more details.
 //
 // All methods are safe to call ONLY from chrome's UI thread.
 class ComponentUpdateService {
  public:
   enum Status {
     kOk,
     kReplaced,
+    kInProgress,
     kError
   };
   // Controls the component updater behavior.
   class Configurator {
    public:
     enum Events {
       kManifestCheck,
       kComponentUpdated,
       kManifestError,
       kNetworkError,
@@ skipping 31 matching lines @@
   virtual Status Start() = 0;
 
   // Stop doing update checks. In-flight requests and pending installations
   // will not be canceled.
   virtual Status Stop() = 0;
 
   // Add component to be checked for updates. You can call this method
   // 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() {}
 };
 
 // Creates the component updater. You must pass a valid |config| allocated on
 // the heap which the component updater will own.
 ComponentUpdateService* ComponentUpdateServiceFactory(
     ComponentUpdateService::Configurator* config);
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
-