User Gesture plumbed from Renderer to Browser's FullscreenController::RequestToLockMouse.

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index f4ec260ce2e27ca7b6d7aa4a5c730cec5c975634..bd4ce94dc6e44ca942f6ce81231c64bcae376a48 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -1463,8 +1463,8 @@ void RenderViewHostImpl::NotifyRendererResponsive() {
   delegate_->RendererResponsive(this);
 }
 
-void RenderViewHostImpl::RequestToLockMouse() {
-  delegate_->RequestToLockMouse();
+void RenderViewHostImpl::RequestToLockMouse(bool user_gesture) {
+  delegate_->RequestToLockMouse(user_gesture);
 }
 
 bool RenderViewHostImpl::IsFullscreen() const {