Pass the user_gesture context in the IPC message FrameMsg_CommitNavigation to the renderer.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 878 matching lines @@
 IPC_MESSAGE_ROUTED2(FrameMsg_SelectPopupMenuItems,
                     bool /* user canceled the popup */,
                     std::vector<int> /* selected indices */)
 #endif
 #endif
 
 // PlzNavigate
 // Tells the renderer that a navigation is ready to commit.  The renderer should
 // request |stream_url| to get access to the stream containing the body of the
 // response.
-IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
+IPC_MESSAGE_ROUTED5(FrameMsg_CommitNavigation,
                     content::ResourceResponseHead,    /* response */
                     GURL,                             /* stream_url */
                     content::CommonNavigationParams,  /* common_params */
-                    content::RequestNavigationParams) /* request_params */
+                    content::RequestNavigationParams, /* request_params */

[jam, 2016/09/29 19:51:38]

per the comment in
https://cs.chromium.org/chromium/src/content/common/navigation_params.h?rcl=0...
(specifically, "Parameters only used by the current architecture should go in
StartNavigationParams.", i think this boolean should move from
StartNavigationParams to RequestNavigationParams

[ananta, 2016/09/29 21:28:43]

This parameter is not used by non PlzNavigate at the moment. In any case I
declared a has_user_gesture field in the RequestNavigationParams structure
Additionally StartNavigationParams is not passed back in
FrameMsg_CommitNavigation

[jam, 2016/09/29 21:38:27]

StartNavigationParams is what's used for non-plznavigate and it has an (android
only) has_user_gesture ?

+                    bool)                             /* user_gesture */
 
 // PlzNavigate
 // Tells the renderer that a navigation failed with the error code |error_code|
 // and that the renderer should display an appropriate error page.
 IPC_MESSAGE_ROUTED4(FrameMsg_FailedNavigation,
                     content::CommonNavigationParams,  /* common_params */
                     content::RequestNavigationParams, /* request_params */
                     bool,                             /* stale_copy_in_cache */
                     int                               /* error_code */)
 
@@ skipping 656 matching lines @@
 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.