Move guest_view to extensions.

chrome/browser/guest_view/web_view/web_view_guest.cc

Index: chrome/browser/guest_view/web_view/web_view_guest.cc
diff --git a/chrome/browser/guest_view/web_view/web_view_guest.cc b/chrome/browser/guest_view/web_view/web_view_guest.cc
index 181749e767e0cb30256d2ffc42c6c111b3e2bfb9..87cffeeb4d5d6d4bb09736cfb12ad00e04096b99 100644
--- a/chrome/browser/guest_view/web_view/web_view_guest.cc
+++ b/chrome/browser/guest_view/web_view/web_view_guest.cc
@@ -14,7 +14,6 @@
 #include "chrome/browser/extensions/menu_manager.h"
 #include "chrome/browser/extensions/script_executor.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
-#include "chrome/browser/guest_view/guest_view_manager.h"
 #include "chrome/browser/guest_view/web_view/web_view_constants.h"
 #include "chrome/browser/guest_view/web_view/web_view_permission_helper.h"
 #include "chrome/browser/guest_view/web_view/web_view_permission_types.h"
@@ -49,6 +48,7 @@
 #include "content/public/common/url_constants.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/guest_view/guest_view_constants.h"
+#include "extensions/browser/guest_view/guest_view_manager.h"
 #include "extensions/common/constants.h"
 #include "ipc/ipc_message_macros.h"
 #include "net/base/escape.h"
@@ -74,6 +74,8 @@ using content::RenderFrameHost;
 using content::ResourceType;
 using content::WebContents;
 
+namespace extensions {
+
 namespace {
 
 std::string WindowOpenDispositionToString(
@@ -1259,3 +1261,5 @@ void WebViewGuest::OnWebViewNewWindowResponse(
   if (!allow)
     guest->Destroy();
 }
+
+}  // namespace extensions