Revert "dark mode: Apply ash styling to overview "No recent items"."

This reverts commit 85559b2c.

Reason for revert: <The latest change wasn't checked in!>

Original change's description:
> dark mode: Apply ash styling to overview "No recent items".
>
> Test: Manual test.
> Bug: 1018302
> Change-Id: I50faaae459dba0126325c2a3b8225e8441b4b62c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536935
> Commit-Queue: Judy Wang <shidi@chromium.org>
> Reviewed-by: Sammie Quon <sammiequon@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#829821}

TBR=sammiequon@chromium.org,shidi@chromium.org

Change-Id: I1b58c03b1eff4d1ee15218bd5dc146f7db28425d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1018302
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2553027
Commit-Queue: Judy Wang <shidi@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829974}

ash/wm/overview/overview_session.cc

@@ -1215,6 +1215,7 @@ void OverviewSession::UpdateNoWindowsWidget() {
     params.name = "OverviewNoWindowsLabel";
     params.horizontal_padding = kNoItemsIndicatorHorizontalPaddingDp;
     params.vertical_padding = kNoItemsIndicatorVerticalPaddingDp;
+    params.rounding_dp = kNoItemsIndicatorRoundingDp;
     auto* color_provider = AshColorProvider::Get();
     params.background_color = color_provider->GetBaseLayerColor(
         AshColorProvider::BaseLayerType::kTransparent80);
@@ -1227,10 +1228,6 @@ void OverviewSession::UpdateNoWindowsWidget() {
     params.hide_in_mini_view = true;
     no_windows_widget_ = std::make_unique<RoundedLabelWidget>();
     no_windows_widget_->Init(std::move(params));
-    no_windows_widget_->GetLayer()->SetRoundedCornerRadius(
-        gfx::RoundedCornersF(kNoItemsIndicatorRoundingDp));
-    no_windows_widget_->GetLayer()->SetBackgroundBlur(
-        static_cast<float>(AshColorProvider::LayerBlurSigma::kBlurDefault));
 
     aura::Window* widget_window = no_windows_widget_->GetNativeWindow();
     widget_window->parent()->StackChildAtBottom(widget_window);

ash/wm/overview/rounded_label_widget.cc

@@ -7,6 +7,7 @@
 #include <memory>
 
 #include "ash/public/cpp/window_properties.h"
+#include "ash/style/ash_color_provider.h"
 #include "ash/wm/overview/scoped_overview_animation_settings.h"
 #include "ui/aura/window.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -42,7 +43,8 @@ class RoundedLabelView : public views::Label {
     SetBackgroundColor(background_color);
     SetPaintToLayer();
     layer()->SetFillsBoundsOpaquely(false);
-
+    layer()->SetBackgroundBlur(
+        static_cast<float>(AshColorProvider::LayerBlurSigma::kBlurDefault));
     const gfx::RoundedCornersF radii(rounding_dp);
     layer()->SetRoundedCornerRadius(radii);
     layer()->SetIsFastRoundedCorner(true);