Move guest_view to extensions.

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 b657adf7a8986481c2d4ef4f590d6df40ee9d939..10b01393b478fbac964b00af9f537dcd5fbd2216 100644
--- a/chrome/browser/task_manager/extension_information.cc
+++ b/chrome/browser/task_manager/extension_information.cc
@@ -7,7 +7,6 @@
 #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"
@@ -17,6 +16,7 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_system.h"
+#include "extensions/browser/guest_view/guest_view_base.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/extension.h"
@@ -148,7 +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 (GuestViewBase::IsGuest(web_contents))
+  if (extensions::GuestViewBase::IsGuest(web_contents))
     return false;
 
   // Extension WebContents tracked by this class will always host extension