Introduce WebViewGuestDelegate.

extensions/browser/guest_view/web_view/web_view_guest_delegate.cc

Index: extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2b09d1941c492e515ce05c41efe08ee3e4d024d0
--- /dev/null
+++ b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
@@ -0,0 +1,23 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
+
+namespace extensions {
+
+WebViewGuestDelegate::WebViewGuestDelegate() {
+}
+
+WebViewGuestDelegate::~WebViewGuestDelegate() {
+}
+extensions::GuestViewBase::Event* WebViewGuestDelegate::OnHandleContextMenu(
+    const content::ContextMenuParams& params) {
+  return NULL;
+}
+
+double WebViewGuestDelegate::GetZoomLevel() {
+  return 1.0;
+}
+
+}  // namespace extensions