Begin to enable extension APIs in Extension Service Worker.

chrome/browser/extensions/chrome_extension_function.cc

 // Copyright 2013 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/chrome_extension_function.h"
 
 #include <utility>
 
 #include "chrome/browser/extensions/chrome_extension_function_details.h"
 #include "chrome/browser/extensions/window_controller.h"
@@ skipping 30 matching lines @@
   }
 
   // Otherwise, try to default to a reasonable browser. If |include_incognito_|
   // is true, we will also search browsers in the incognito version of this
   // profile. Note that the profile may already be incognito, in which case
   // we will search the incognito version only, regardless of the value of
   // |include_incognito|. Look only for browsers on the active desktop as it is
   // preferable to pretend no browser is open then to return a browser on
   // another desktop.
   content::WebContents* web_contents = GetSenderWebContents();
-  if (web_contents) {
-    Profile* profile =
-        Profile::FromBrowserContext(web_contents->GetBrowserContext());
-    Browser* browser = chrome::FindAnyBrowser(profile, include_incognito_);
-    if (browser)
-      return browser;
-  }
+  Profile* profile = Profile::FromBrowserContext(
+      web_contents ? web_contents->GetBrowserContext() : browser_context());
+  Browser* browser = chrome::FindAnyBrowser(profile, include_incognito_);
+  if (browser)
+    return browser;
 
   // NOTE(rafaelw): This can return NULL in some circumstances. In particular,
   // a background_page onload chrome.tabs api call can make it into here
   // before the browser is sufficiently initialized to return here, or
   // all of this profile's browser windows may have been closed.
   // A similar situation may arise during shutdown.
   // TODO(rafaelw): Delay creation of background_page until the browser
   // is available. http://code.google.com/p/chromium/issues/detail?id=13284
   return NULL;
 }
@@ skipping 51 matching lines @@
 ExtensionFunction::ResponseAction ChromeSyncExtensionFunction::Run() {
   return RespondNow(RunSync() ? ArgumentList(std::move(results_))
                               : Error(error_));
 }
 
 // static
 bool ChromeSyncExtensionFunction::ValidationFailure(
     ChromeSyncExtensionFunction* function) {
   return false;
 }