Remove some RenderProcessHost::IsGuest call sites

chrome/browser/task_manager/extension_information.cc

Index: chrome/browser/task_manager/extension_information.cc
diff --git a/chrome/browser/task_manager/extension_information.cc b/chrome/browser/task_manager/extension_information.cc
index d95531ed572a585ccd82c3e5d492fbabe3d481c0..b657adf7a8986481c2d4ef4f590d6df40ee9d939 100644
--- a/chrome/browser/task_manager/extension_information.cc
+++ b/chrome/browser/task_manager/extension_information.cc
@@ -7,6 +7,7 @@
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/guest_view/guest_view_base.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/task_manager/renderer_resource.h"
@@ -147,7 +148,7 @@ void ExtensionInformation::GetAll(const NewWebContentsCallback& callback) {
 bool ExtensionInformation::CheckOwnership(WebContents* web_contents) {
   // Don't add WebContents that belong to a guest (those are handled by
   // GuestInformation). Otherwise they will be added twice.
-  if (web_contents->GetRenderProcessHost()->IsGuest())
+  if (GuestViewBase::IsGuest(web_contents))
     return false;
 
   // Extension WebContents tracked by this class will always host extension