Component updater should wake up upon new component registration.

chrome/browser/component_updater/component_updater_service.cc

 // Copyright 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.
 
 #include "chrome/browser/component_updater/component_updater_service.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 471 matching lines @@
   if (uit) {
     uit->component = component;
     return kReplaced;
   }
 
   uit = new CrxUpdateItem;
   uit->id.swap(id);
   uit->component = component;
 
   work_items_.push_back(uit);
+
   // If this is the first component registered we call Start to
-  // schedule the first timer.
-  if (running_ && (work_items_.size() == 1))
-    Start();
+  // schedule the first timer. Otherwise, reset the timer to trigger another
+  // pass over the work items, if the component updater is sleeping, fact
+  // indicated by a running timer. If the timer is not running, it means that
+  // the service is busy updating something, and in that case, this component
+  // will be picked up at the next pass.
+  if (running_) {
+    if (work_items_.size() == 1) {
+      Start();
+    } else if (timer_.IsRunning()) {
+        timer_.Start(FROM_HERE,
+                     base::TimeDelta::FromSeconds(config_->InitialDelay()),
+                     this,
+                     &CrxUpdateService::ProcessPendingItems);
+    }
+  }
 
   return kOk;
 }
 
 std::vector<std::string> CrxUpdateService::GetComponentIDs() const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   std::vector<std::string> component_ids;
   for (UpdateItems::const_iterator it = work_items_.begin();
        it != work_items_.end();
        ++it) {
@@ skipping 569 matching lines @@
 
 // The component update factory. Using the component updater as a singleton
 // is the job of the browser process.
 ComponentUpdateService* ComponentUpdateServiceFactory(
     ComponentUpdateService::Configurator* config) {
   DCHECK(config);
   return new CrxUpdateService(config);
 }
 
 }  // namespace component_updater