Update CrOS to use scoped_refptr<T>::get() rather than implicit "operator T*"

content/browser/web_contents/web_contents_view_aura_browsertest.cc

Index: content/browser/web_contents/web_contents_view_aura_browsertest.cc
diff --git a/content/browser/web_contents/web_contents_view_aura_browsertest.cc b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
index ba69ddf4a92cf44ce834d8d89b73c2822a3f8879..f7ffd0ec6cfe74afd64e2c29e9f0dc6109b8f011 100644
--- a/content/browser/web_contents/web_contents_view_aura_browsertest.cc
+++ b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
@@ -69,7 +69,7 @@ class ScreenshotTracker : public WebContentsScreenshotManager {
   virtual void OnScreenshotSet(NavigationEntryImpl* entry) OVERRIDE {
     --waiting_for_screenshots_;
     WebContentsScreenshotManager::OnScreenshotSet(entry);
-    if (waiting_for_screenshots_ == 0 && message_loop_runner_)
+    if (waiting_for_screenshots_ == 0 && message_loop_runner_.get())
       message_loop_runner_->Quit();
   }