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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 0483c3d0781c3c8393f1c3d29009769c38df48bd..24fafd9677c7276347a0184ad8d35278aed818e8 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -4859,7 +4859,8 @@ void RenderFrameImpl::OnCommitNavigation(
     const ResourceResponseHead& response,
     const GURL& stream_url,
     const CommonNavigationParams& common_params,
-    const RequestNavigationParams& request_params) {
+    const RequestNavigationParams& request_params,
+    bool user_gesture) {
   CHECK(IsBrowserSideNavigationEnabled());
   // This will override the url requested by the WebURLLoader, as well as
   // provide it with the response to the request.
@@ -4868,6 +4869,11 @@ void RenderFrameImpl::OnCommitNavigation(
   stream_override->stream_url = stream_url;
   stream_override->response = response;
 
+  // If the request was initiated in the context of a user gesture then make
+  // sure that the navigation also executes in the context of a user gesture.
+  std::unique_ptr<blink::WebScopedUserGesture> gesture(
+      user_gesture ? new blink::WebScopedUserGesture : nullptr);
+
   NavigateInternal(common_params, StartNavigationParams(), request_params,
                    std::move(stream_override));
 }