Adopt chromeos::TabletState in ash/.../caption_buttons

BUG=1113900
R=jamescook@chromium.org

Change-Id: I2f6f52bafa59f3c93a47b77c8429b9c0e25ac076
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2446204
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813832}

ash/public/cpp/caption_buttons/frame_caption_button_container_view.cc

@@ -10,10 +10,10 @@
 #include "ash/public/cpp/caption_buttons/caption_button_model.h"
 #include "ash/public/cpp/caption_buttons/frame_size_button.h"
 #include "ash/public/cpp/caption_buttons/snap_controller.h"
-#include "ash/public/cpp/tablet_mode.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/numerics/ranges.h"
+#include "chromeos/ui/tablet_state.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -420,7 +420,7 @@ void FrameCaptionButtonContainerView::ButtonPressed(views::Button* sender,
     }
   } else if (sender == close_button_) {
     frame_->Close();
-    if (TabletMode::Get()->InTabletMode())
+    if (chromeos::TabletState::Get()->InTabletMode())
       RecordAction(UserMetricsAction("Tablet_WindowCloseFromCaptionButton"));
     else
       RecordAction(UserMetricsAction("CloseButton_Clk"));