Remove ShouldBlockShelfAutoHide().

ash/system/palette/palette_tray.cc

Index: ash/system/palette/palette_tray.cc
diff --git a/ash/system/palette/palette_tray.cc b/ash/system/palette/palette_tray.cc
index f6c46f8ca65698b80e9b07bc98aae4e304d35503..025ae1f07cbb0b5a3fe8d969c599f812deb04db2 100644
--- a/ash/system/palette/palette_tray.cc
+++ b/ash/system/palette/palette_tray.cc
@@ -179,10 +179,6 @@ bool PaletteTray::ShowPalette() {
 
   DCHECK(tray_container());
 
-  // The views::TrayBubbleView ctor will cause a shelf auto hide update check.
-  // Make sure to block auto hiding before that check happens.
-  should_block_shelf_auto_hide_ = true;
-
   // TODO(tdanderson): Refactor into common row layout code.
   // TODO(tdanderson|jdufault): Add material design ripple effects to the menu
   // rows.
@@ -315,7 +311,6 @@ void PaletteTray::HideBubble(const views::TrayBubbleView* bubble_view) {
 }
 
 void PaletteTray::HidePalette() {
-  should_block_shelf_auto_hide_ = false;
   is_bubble_auto_opened_ = false;
   num_actions_in_bubble_ = 0;
   bubble_.reset();
@@ -350,10 +345,6 @@ void PaletteTray::RecordPaletteModeCancellation(PaletteModeCancelType type) {
       PaletteModeCancelType::PALETTE_MODE_CANCEL_TYPE_COUNT);
 }
 
-bool PaletteTray::ShouldBlockShelfAutoHide() const {
-  return should_block_shelf_auto_hide_;
-}
-
 void PaletteTray::OnActiveToolChanged() {
   ++num_actions_in_bubble_;
   UpdateTrayIcon();