Adds functionality to anchor widgets to the top-of-window views in immersive mode

chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc

Index: chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc b/chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc
index 41068cde7c7a2ad821b717e374ef2b213bef0c6a..d23d9c85440a6b6f1b345df83b29b3a7968abb7e 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller_stub.cc
@@ -42,3 +42,15 @@ ImmersiveModeController::RevealedLock*
     ImmersiveModeControllerStub::GetRevealedLock() {
   return NULL;
 }
+
+void ImmersiveModeControllerStub::AnchorWidgetToTopContainer(
+    views::Widget* widget,
+    int y_offset) {
+}
+
+void ImmersiveModeControllerStub::UnanchorWidgetFromTopContainer(
+    views::Widget* widget) {
+}
+
+void ImmersiveModeControllerStub::OnTopContainerBoundsChanged() {
+}