Navigation transitions (web to native app): Hide/Show transition elements (Chrome side)

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/frame_message_enums.h"
@@ skipping 421 matching lines @@
 // Requests a navigation to the supplied markup, in an iframe with sandbox
 // attributes.
 IPC_MESSAGE_ROUTED1(FrameMsg_SetupTransitionView,
                     std::string /* markup */)
 
 // Tells the renderer to hide the elements specified by the supplied CSS
 // selector, and activates any exiting-transition stylesheets.
 IPC_MESSAGE_ROUTED1(FrameMsg_BeginExitTransition,
                     std::string /* css_selector */)
 
+// Tell the renderer to hide transition elements.
+IPC_MESSAGE_ROUTED1(FrameMsg_HideTransitionElements,
+                    std::string /* css_selector */)
+
+// Tell the renderer to hide transition elements.
+IPC_MESSAGE_ROUTED1(FrameMsg_ShowTransitionElements,
+                    std::string /* css_selector */)
+
 // Tells the renderer to reload the frame, optionally ignoring the cache while
 // doing so.
 IPC_MESSAGE_ROUTED1(FrameMsg_Reload,
                     bool /* ignore_cache */)
 
 // Notifies the color chooser client that the user selected a color.
 IPC_MESSAGE_ROUTED2(FrameMsg_DidChooseColorResponse, unsigned, SkColor)
 
 // Notifies the color chooser client that the color chooser has ended.
 IPC_MESSAGE_ROUTED1(FrameMsg_DidEndColorChooser, unsigned)
@@ skipping 331 matching lines @@
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DidFirstVisuallyNonEmptyPaint)
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 
 // Message to show/hide a popup menu using native controls.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif