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

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index d4779ae3cfd7a9dea43416593bc876ec2beaf7ef..c980724f07368543407feaaf1c93a8c68f7027ce 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1008,7 +1008,7 @@ gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
   return gfx::Rect();
 }
 
-void RenderWidgetHostImpl::RequestToLockMouse() {
+void RenderWidgetHostImpl::RequestToLockMouse(bool /* user_gesture */) {
   // Directly reject to lock the mouse. Subclass can override this method to
   // decide whether to allow mouse lock or not.
   GotResponseToLockMouseRequest(false);
@@ -1427,7 +1427,7 @@ void RenderWidgetHostImpl::OnMsgDidActivateAcceleratedCompositing(
     view_->OnAcceleratedCompositingStateChange();
 }
 
-void RenderWidgetHostImpl::OnMsgLockMouse() {
+void RenderWidgetHostImpl::OnMsgLockMouse(bool user_gesture) {
   if (pending_mouse_lock_request_) {
     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
     return;
@@ -1437,7 +1437,7 @@ void RenderWidgetHostImpl::OnMsgLockMouse() {
   }
 
   pending_mouse_lock_request_ = true;
-  RequestToLockMouse();
+  RequestToLockMouse(user_gesture);
 }
 
 void RenderWidgetHostImpl::OnMsgUnlockMouse() {