Revert "Move focus rings and highlight layers under accessibility bubbles."

This reverts commit cd68a26c.

Reason for revert:
Focus ring disappears in switch access menu
crbug.com/1157261


Original change's description:
> Move focus rings and highlight layers under accessibility bubbles.
>
> Will allow Select-to-speak panel UI to appear above focus ring and highlight layers. This also avoids the need to create more window containers.
>
> Bug: 1143814
> Change-Id: I1c4fce614404c6cabd0336eed2ab6fa7ac1d4c48
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568547
> Commit-Queue: Joel Riley <joelriley@google.com>
> Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833155}

TBR=dmazzoni@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,joelriley@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1143814
Change-Id: I08c1552e93763dfbf8e09ff75e23e64033456675
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583106Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835745}

ash/accessibility/accessibility_focus_ring_controller_unittest.cc

@@ -6,7 +6,6 @@
 
 #include "ash/accessibility/accessibility_cursor_ring_layer.h"
 #include "ash/public/cpp/accessibility_focus_ring_info.h"
-#include "ash/public/cpp/shell_window_ids.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -111,9 +110,7 @@ TEST_F(AccessibilityFocusRingControllerTest, FocusRingWorksOnMultipleDisplays) {
       controller->GetFocusRingGroupForTesting("catsRCute")
           ->focus_layers_for_testing();
   EXPECT_EQ(1u, layers.size());
-  aura::Window* window0_container = Shell::GetContainer(
-      root_windows[0], kShellWindowId_AccessibilityPanelContainer);
-  EXPECT_EQ(window0_container, layers[0]->root_window());
+  EXPECT_EQ(root_windows[0], layers[0]->root_window());
   // The focus ring has some padding, so just check the center point is where
   // we would expect it.
   EXPECT_EQ(layers[0]->layer()->GetTargetBounds().CenterPoint(),
@@ -130,9 +127,7 @@ TEST_F(AccessibilityFocusRingControllerTest, FocusRingWorksOnMultipleDisplays) {
       moved_layers = controller->GetFocusRingGroupForTesting("catsRCute")
                          ->focus_layers_for_testing();
   EXPECT_EQ(1u, moved_layers.size());
-  aura::Window* window1_container = Shell::GetContainer(
-      root_windows[1], kShellWindowId_AccessibilityPanelContainer);
-  EXPECT_EQ(window1_container, moved_layers[0]->root_window());
+  EXPECT_EQ(root_windows[1], moved_layers[0]->root_window());
   EXPECT_EQ(moved_layers[0]->layer()->GetTargetBounds().CenterPoint(),
             gfx::Rect(100, 50, 10, 10).CenterPoint());
 }

ash/accessibility/accessibility_focus_ring_layer.cc

@@ -4,7 +4,6 @@
 
 #include "ash/accessibility/accessibility_focus_ring_layer.h"
 
-#include "ash/public/cpp/shell_window_ids.h"
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "third_party/skia/include/core/SkPaint.h"
@@ -101,8 +100,6 @@ void AccessibilityFocusRingLayer::Set(const AccessibilityFocusRing& ring) {
   display::Display display =
       display::Screen::GetScreen()->GetDisplayMatching(bounds);
   aura::Window* root_window = Shell::GetRootWindowForDisplayId(display.id());
-  aura::Window* container = Shell::GetContainer(
-      root_window, kShellWindowId_AccessibilityPanelContainer);
 
   if (SkColorGetA(background_color_) > 0) {
     bounds = display.bounds();
@@ -110,8 +107,8 @@ void AccessibilityFocusRingLayer::Set(const AccessibilityFocusRing& ring) {
     int inset = kGradientWidth;
     bounds.Inset(-inset, -inset, -inset, -inset);
   }
-  ::wm::ConvertRectFromScreen(container, &bounds);
-  CreateOrUpdateLayer(container, "AccessibilityFocusRing", bounds);
+  ::wm::ConvertRectFromScreen(root_window, &bounds);
+  CreateOrUpdateLayer(root_window, "AccessibilityFocusRing", bounds);
 }
 
 void AccessibilityFocusRingLayer::SetAppearance(FocusRingType type,

ash/accessibility/accessibility_highlight_layer.cc

@@ -4,7 +4,6 @@
 
 #include "ash/accessibility/accessibility_highlight_layer.h"
 
-#include "ash/public/cpp/shell_window_ids.h"
 #include "ash/shell.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
@@ -50,10 +49,8 @@ void AccessibilityHighlightLayer::Set(const std::vector<gfx::Rect>& rects,
   display::Display display =
       display::Screen::GetScreen()->GetDisplayMatching(bounds);
   aura::Window* root_window = Shell::GetRootWindowForDisplayId(display.id());
-  aura::Window* container = Shell::GetContainer(
-      root_window, kShellWindowId_AccessibilityPanelContainer);
-  ::wm::ConvertRectFromScreen(container, &bounds);
-  CreateOrUpdateLayer(container, "AccessibilityHighlight", bounds);
+  ::wm::ConvertRectFromScreen(root_window, &bounds);
+  CreateOrUpdateLayer(root_window, "AccessibilityHighlight", bounds);
 }
 
 bool AccessibilityHighlightLayer::CanAnimate() const {

ash/accessibility/focus_ring_controller.cc

@@ -5,8 +5,6 @@
 #include "ash/accessibility/focus_ring_controller.h"
 
 #include "ash/accessibility/focus_ring_layer.h"
-#include "ash/public/cpp/shell_window_ids.h"
-#include "ash/shell.h"
 #include "ash/system/tray/actionable_view.h"
 #include "ash/system/tray/tray_background_view.h"
 #include "ash/wm/window_util.h"
@@ -85,9 +83,7 @@ void FocusRingController::UpdateFocusRing() {
   // Update the focus ring layer.
   if (!focus_ring_layer_)
     focus_ring_layer_.reset(new FocusRingLayer(this));
-  aura::Window* container = Shell::GetContainer(
-      root_window, kShellWindowId_AccessibilityPanelContainer);
-  focus_ring_layer_->Set(container, view_bounds);
+  focus_ring_layer_->Set(root_window, view_bounds);
 }
 
 void FocusRingController::OnDeviceScaleFactorChanged() {