Register a Service Worker when an extension is enabled.

chrome/browser/extensions/extension_host.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 162 matching lines @@
 
 RenderViewHost* ExtensionHost::render_view_host() const {
   // TODO(mpcomplete): This can be NULL. How do we handle that?
   return render_view_host_;
 }
 
 bool ExtensionHost::IsRenderViewLive() const {
   return render_view_host()->IsRenderViewLive();
 }
 
-void ExtensionHost::CreateRenderViewSoon() {
+void ExtensionHost::CreateRenderViewSoon(const base::Closure& continuation) {
   if ((render_process_host() && render_process_host()->HasConnection())) {
     // If the process is already started, go ahead and initialize the RenderView
     // synchronously. The process creation is the real meaty part that we want
     // to defer.
     CreateRenderViewNow();
+    if (!continuation.is_null())
+      continuation.Run();
   } else {
+    if (!continuation.is_null())
+      when_render_view_created_.push_back(continuation);
     ProcessCreationQueue::GetInstance()->CreateSoon(this);
   }
 }
 
 void ExtensionHost::CreateRenderViewNow() {
   LoadInitialURL();
   if (IsBackgroundPage()) {
     DCHECK(IsRenderViewLive());
     // Connect orphaned dev-tools instances.
     delegate_->OnRenderViewCreatedForBackgroundPage(this);
   }
+  std::vector<base::Closure> running;
+  running.swap(when_render_view_created_);
+  for (std::vector<base::Closure>::const_iterator it = running.begin();
+       it != running.end();
+       ++it) {
+    it->Run();
+  }
 }
 
 const GURL& ExtensionHost::GetURL() const {
   return host_contents()->GetURL();
 }
 
 void ExtensionHost::LoadInitialURL() {
   host_contents_->GetController().LoadURL(
       initial_url_, content::Referrer(), content::PAGE_TRANSITION_LINK,
       std::string());
@@ skipping 226 matching lines @@
 bool ExtensionHost::PreHandleGestureEvent(
     content::WebContents* source,
     const blink::WebGestureEvent& event) {
   // Disable pinch zooming.
   return event.type == blink::WebGestureEvent::GesturePinchBegin ||
       event.type == blink::WebGestureEvent::GesturePinchUpdate ||
       event.type == blink::WebGestureEvent::GesturePinchEnd;
 }
 
 }  // namespace extensions