Introduce runtime.onSuspendCanceled() event.

chrome/browser/extensions/lazy_background_task_queue.cc

Index: chrome/browser/extensions/lazy_background_task_queue.cc
diff --git a/chrome/browser/extensions/lazy_background_task_queue.cc b/chrome/browser/extensions/lazy_background_task_queue.cc
index 6c69ef128b63530a949e1be65210092d3bfd49b5..7c083a5c9b4aefa514d6c8799195d577273420be 100644
--- a/chrome/browser/extensions/lazy_background_task_queue.cc
+++ b/chrome/browser/extensions/lazy_background_task_queue.cc
@@ -50,6 +50,8 @@ bool LazyBackgroundTaskQueue::ShouldEnqueueTask(
         pm->GetBackgroundHostForExtension(extension->id());
     if (!background_host || !background_host->did_stop_loading())
       return true;
+    if (pm->IsBackgroundHostClosing(extension->id()))
+      pm->CancelSuspend(extension);
   }
 
   return false;
@@ -92,8 +94,7 @@ void LazyBackgroundTaskQueue::StartLazyBackgroundPage(
           extensions()->GetByID(extension_id);
   if (extension) {
     DCHECK(extension->has_lazy_background_page());
-    pm->IncrementLazyKeepaliveCount(
-        extension, ExtensionProcessManager::DONT_CANCEL_SUSPEND);
+    pm->IncrementLazyKeepaliveCount(extension);
     pm->CreateBackgroundHost(extension, extension->GetBackgroundURL());
   }