Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/managed_mode/managed_mode_navigation_observer.cc

Index: chrome/browser/managed_mode/managed_mode_navigation_observer.cc
===================================================================
--- chrome/browser/managed_mode/managed_mode_navigation_observer.cc	(revision 175396)
+++ chrome/browser/managed_mode/managed_mode_navigation_observer.cc	(working copy)
@@ -22,9 +22,12 @@
 
 class ManagedModeWarningInfobarDelegate : public ConfirmInfoBarDelegate {
  public:
-  explicit ManagedModeWarningInfobarDelegate(InfoBarService* infobar_service);
+  // Creates a managed mode warning delegate and adds it to |infobar_service|.
+  // Returns the delegate if it was successfully added.
+  static InfoBarDelegate* Create(InfoBarService* infobar_service);
 
  private:
+  explicit ManagedModeWarningInfobarDelegate(InfoBarService* infobar_service);
   virtual ~ManagedModeWarningInfobarDelegate();
 
   // ConfirmInfoBarDelegate overrides:
@@ -64,6 +67,13 @@
   web_contents->GetDelegate()->CloseContents(web_contents);
 }
 
+// static
+InfoBarDelegate* ManagedModeWarningInfobarDelegate::Create(
+    InfoBarService* infobar_service) {
+  return infobar_service->AddInfoBar(scoped_ptr<InfoBarDelegate>(
+      new ManagedModeWarningInfobarDelegate(infobar_service)));
+}
+
 ManagedModeWarningInfobarDelegate::ManagedModeWarningInfobarDelegate(
     InfoBarService* infobar_service)
     : ConfirmInfoBarDelegate(infobar_service) {}
@@ -138,11 +148,8 @@
 
   if (behavior == ManagedModeURLFilter::WARN) {
     if (!warn_infobar_delegate_) {
-      InfoBarService* infobar_service =
-          InfoBarService::FromWebContents(web_contents());
-      warn_infobar_delegate_ =
-          new ManagedModeWarningInfobarDelegate(infobar_service);
-      infobar_service->AddInfoBar(warn_infobar_delegate_);
+      warn_infobar_delegate_ = ManagedModeWarningInfobarDelegate::Create(
+          InfoBarService::FromWebContents(web_contents()));
     }
   } else {
     if (warn_infobar_delegate_) {