Silent mouse lock after unlock by target

content/renderer/mouse_lock_dispatcher.cc

Index: content/renderer/mouse_lock_dispatcher.cc
diff --git a/content/renderer/mouse_lock_dispatcher.cc b/content/renderer/mouse_lock_dispatcher.cc
index 886067cd4d6dcf47893698a3d3271b44676152ab..e78b1d3f464c384d2120f6dbad870df5aff51aa0 100644
--- a/content/renderer/mouse_lock_dispatcher.cc
+++ b/content/renderer/mouse_lock_dispatcher.cc
@@ -16,6 +16,7 @@ MouseLockDispatcher::MouseLockDispatcher(RenderViewImpl* render_view_impl)
       mouse_locked_(false),
       pending_lock_request_(false),
       pending_unlock_request_(false),
+      unlock_source_(content::NOT_TARGET),
       target_(NULL) {
 }
 
@@ -34,13 +35,19 @@ bool MouseLockDispatcher::LockMouse(LockTarget* target) {
       render_view_impl_->webview()->mainFrame() &&
       render_view_impl_->webview()->mainFrame()->isProcessingUserGesture();
 
-  Send(new ViewHostMsg_LockMouse(routing_id(), user_gesture));
+  Send(
+      new ViewHostMsg_LockMouse(routing_id(),
+          user_gesture ? content::USER_GESTURE : content::NOT_USER_GESTURE,
+          unlock_source_));
+  // reset the source
+  unlock_source_ = content::NOT_TARGET;
   return true;
 }
 
 void MouseLockDispatcher::UnlockMouse(LockTarget* target) {
   if (target && target == target_ && !pending_unlock_request_) {
     pending_unlock_request_ = true;
+    unlock_source_ = content::TARGET;
     Send(new ViewHostMsg_UnlockMouse(routing_id()));
   }
 }
@@ -120,4 +127,3 @@ void MouseLockDispatcher::OnMouseLockLost() {
   if (last_target)
     last_target->OnMouseLockLost();
 }
-