[PointerLock] Move "silent mouse lock" logic from renderer to RWHI

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 610567e43a9f72e1ced93032dc903e0581b9a79c..bb289ad15f38cf5fff0df9b3b6f3b6cd3c9e4593 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -286,6 +286,7 @@ RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
       suppress_events_until_keydown_(false),
       pending_mouse_lock_request_(false),
       allow_privileged_mouse_lock_(false),
+      is_last_unlocked_by_target_(false),
       has_touch_handler_(false),
       is_in_touchpad_gesture_fling_(false),
       latency_tracker_(),
@@ -1747,12 +1748,14 @@ void RenderWidgetHostImpl::ImeCancelComposition() {
             gfx::Range::InvalidRange(), 0, 0));
 }
 
-void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
+void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary(
+    bool is_unlocked_by_target) {
   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
   if (pending_mouse_lock_request_) {
     pending_mouse_lock_request_ = false;
     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
   } else if (IsMouseLocked()) {
+    is_last_unlocked_by_target_ = is_unlocked_by_target;
     view_->UnlockMouse();
   }
 }
@@ -2068,7 +2071,6 @@ void RenderWidgetHostImpl::OnImeCancelComposition() {
 }
 
 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
-                                       bool last_unlocked_by_target,
                                        bool privileged) {
   if (pending_mouse_lock_request_) {
     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
@@ -2077,8 +2079,10 @@ void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
 
   pending_mouse_lock_request_ = true;
   if (delegate_) {
-    delegate_->RequestToLockMouse(this, user_gesture, last_unlocked_by_target,
+    delegate_->RequestToLockMouse(this, user_gesture,
+                                  is_last_unlocked_by_target_,
                                   privileged && allow_privileged_mouse_lock_);
+    is_last_unlocked_by_target_ = false;
     return;
   }
 
@@ -2092,7 +2096,7 @@ void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
 }
 
 void RenderWidgetHostImpl::OnUnlockMouse() {
-  RejectMouseLockOrUnlockIfNecessary();
+  RejectMouseLockOrUnlockIfNecessary(true);
 }
 
 void RenderWidgetHostImpl::OnShowDisambiguationPopup(