[a11y] Enable GTS for accessibility (2/2)

This CL enables the new Tab Switcher in list version when TalkBack is on
for LowEnd phone.

Change-Id: If8d1f0dd54624be8ec66eeb953fffbc9a30c34a2
Bug: 992134
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2045072
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747646}

chrome/android/java/src/org/chromium/chrome/browser/device/DeviceClassManager.java

@@ -5,6 +5,7 @@
 package org.chromium.chrome.browser.device;
 
 import org.chromium.base.CommandLine;
+import org.chromium.base.ContextUtils;
 import org.chromium.base.SysUtils;
 import org.chromium.chrome.browser.flags.ChromeFeatureList;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
@@ -44,9 +45,7 @@ public class DeviceClassManager {
         // Device based configurations.
         if (SysUtils.isLowEndDevice()) {
             mEnableLayerDecorationCache = true;
-            mEnableAccessibilityLayout =
-                    !ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_GROUPS_CONTINUATION_ANDROID)
-                    || !ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_GROUPS_ANDROID);
+            mEnableAccessibilityLayout = true;
             mEnableAnimations = false;
             mEnablePrerendering = false;
             mEnableToolbarSwipe = false;
@@ -87,9 +86,15 @@ public class DeviceClassManager {
      * @return Whether or not should use the accessibility tab switcher.
      */
     public static boolean enableAccessibilityLayout() {
-        if (ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_GROUPS_CONTINUATION_ANDROID)) {
+        if (isPhone()
+                && ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_GROUPS_CONTINUATION_ANDROID)
+                && (ChromeFeatureList.isEnabled(ChromeFeatureList.TAB_GROUPS_ANDROID)
+                        || (!SysUtils.isLowEndDevice()
+                                && ChromeFeatureList.isEnabled(
+                                        ChromeFeatureList.TAB_GRID_LAYOUT_ANDROID)))) {
             return false;
         }
+
         if (getInstance().mEnableAccessibilityLayout) return true;
         if (!AccessibilityUtil.isAccessibilityEnabled()) return false;
         return SharedPreferencesManager.getInstance().readBoolean(
@@ -126,4 +131,9 @@ public class DeviceClassManager {
     public static boolean enableToolbarSwipe() {
         return getInstance().mEnableToolbarSwipe;
     }
+
+    private static boolean isPhone() {
+        return !DeviceFormFactor.isNonMultiDisplayContextOnTablet(
+                ContextUtils.getApplicationContext());
+    }
 }