Remove linked_ptr usage in //base.

extensions/browser/guest_view/extension_options/extension_options_guest.cc

Index: extensions/browser/guest_view/extension_options/extension_options_guest.cc
diff --git a/extensions/browser/guest_view/extension_options/extension_options_guest.cc b/extensions/browser/guest_view/extension_options/extension_options_guest.cc
index f594ade9b2630e53a5138f14152cfa2356f9ff51..9f3c07af53e48b505f821c24747a125b91e4ca89 100644
--- a/extensions/browser/guest_view/extension_options/extension_options_guest.cc
+++ b/extensions/browser/guest_view/extension_options/extension_options_guest.cc
@@ -127,8 +127,8 @@ void ExtensionOptionsGuest::DidInitialize(
 
 void ExtensionOptionsGuest::GuestViewDidStopLoading() {
   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  DispatchEventToView(new GuestViewEvent(
-      extension_options_internal::OnLoad::kEventName, std::move(args)));
+  DispatchEventToView(make_scoped_ptr(new GuestViewEvent(
+      extension_options_internal::OnLoad::kEventName, std::move(args))));
 }
 
 const char* ExtensionOptionsGuest::GetAPINamespace() const {
@@ -148,9 +148,9 @@ void ExtensionOptionsGuest::OnPreferredSizeChanged(const gfx::Size& pref_size) {
   // Convert the size from physical pixels to logical pixels.
   options.width = PhysicalPixelsToLogicalPixels(pref_size.width());
   options.height = PhysicalPixelsToLogicalPixels(pref_size.height());
-  DispatchEventToView(new GuestViewEvent(
+  DispatchEventToView(make_scoped_ptr(new GuestViewEvent(
       extension_options_internal::OnPreferredSizeChanged::kEventName,
-      options.ToValue()));
+      options.ToValue())));
 }
 
 bool ExtensionOptionsGuest::ShouldHandleFindRequestsForEmbedder() const {
@@ -180,9 +180,9 @@ WebContents* ExtensionOptionsGuest::OpenURLFromTab(
 }
 
 void ExtensionOptionsGuest::CloseContents(WebContents* source) {
-  DispatchEventToView(
+  DispatchEventToView(make_scoped_ptr(
       new GuestViewEvent(extension_options_internal::OnClose::kEventName,
-                         make_scoped_ptr(new base::DictionaryValue())));
+                         make_scoped_ptr(new base::DictionaryValue()))));
 }
 
 bool ExtensionOptionsGuest::HandleContextMenu(