Fix page zoom to be frame-centric for out-of-process frames.

content/common/page_message_enums.h

Index: content/common/page_message_enums.h
diff --git a/content/common/page_message_enums.h b/content/common/page_message_enums.h
new file mode 100644
index 0000000000000000000000000000000000000000..1f7119fb9b2821504bb3a48fc0a9a5b6ab7fbd12
--- /dev/null
+++ b/content/common/page_message_enums.h
@@ -0,0 +1,14 @@
+// Copyright 2016 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.
+
+#ifndef CONTENT_COMMON_PAGE_MESSAGE_ENUMS_H_
+#define CONTENT_COMMON_PAGE_MESSAGE_ENUMS_H_
+
+enum class PageMsg_SetZoomLevel_Command {
+  ZOOM_SET_TEMPORARY,
+  ZOOM_CLEAR_TEMPORARY,
+  ZOOM_USE_CURRENT_TEMPORARY_MODE
+};
+
+#endif  // CONTENT_COMMON_PAGE_MESSAGE_ENUMS_H_