Improve "turn on Bluetooth" flow

chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java

Index: chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java b/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
index 9bee553b1e10ce710b8af1fe7d70d2301f97be1a..2431ce56e16004a89fd647977e0689f3f53d7f97 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
@@ -6,6 +6,7 @@ package org.chromium.chrome.browser;
 
 import android.Manifest;
 import android.app.Activity;
+import android.bluetooth.BluetoothAdapter;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -20,6 +21,7 @@ import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.omnibox.OmniboxUrlEmphasizer;
 import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.components.location.LocationUtils;
 import org.chromium.ui.base.WindowAndroid;
 import org.chromium.ui.text.NoUnderlineClickableSpan;
@@ -69,6 +71,9 @@ public class BluetoothChooserDialog
     // Used to keep track of when the Mode Changed Receiver is registered.
     boolean mIsLocationModeChangedReceiverRegistered;
 
+    // The status message to show when the bluetooth adapter is turned off.
+    private final SpannableString mAdapterOffStatus;
+
     @VisibleForTesting
     final BroadcastReceiver mLocationModeBroadcastReceiver = new BroadcastReceiver() {
         @Override
@@ -106,6 +111,10 @@ public class BluetoothChooserDialog
         mOrigin = origin;
         mSecurityLevel = securityLevel;
         mNativeBluetoothChooserDialogPtr = nativeBluetoothChooserDialogPtr;
+        mAdapterOffStatus =
+                SpanApplier.applySpans(mActivity.getString(R.string.bluetooth_adapter_off_help),
+                        new SpanInfo("<link>", "</link>",
+                                new BluetoothClickableSpan(LinkType.ADAPTER_OFF_HELP, mActivity)));
     }
 
     /**
@@ -275,9 +284,19 @@ public class BluetoothChooserDialog
                     break;
                 }
                 case ADAPTER_OFF: {
-                    Intent intent = new Intent();
-                    intent.setAction(android.provider.Settings.ACTION_BLUETOOTH_SETTINGS);
-                    mContext.startActivity(intent);
+                    Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
+                    if (!mWindowAndroid.canResolveActivity(intent)) {
+                        intent = new Intent(android.provider.Settings.ACTION_BLUETOOTH_SETTINGS);
+                        if (!mWindowAndroid.canResolveActivity(intent)) {
+                            String bluetoothSettingsUnavailable =
+                                    mActivity.getString(R.string.bluetooth_settings_unavailable);
+                            mItemChooserDialog.setErrorState(
+                                    bluetoothSettingsUnavailable, mAdapterOffStatus);
+                            break;
+                        }
+                    }
+                    mItemChooserDialog.setCloseWindowWhenLoseFocus(false);
+                    IntentUtils.safeStartActivity(mContext, intent);
                     break;
                 }
                 case ADAPTER_OFF_HELP: {
@@ -357,12 +376,8 @@ public class BluetoothChooserDialog
                 mActivity.getString(R.string.bluetooth_adapter_off),
                 new SpanInfo("<link>", "</link>",
                         new BluetoothClickableSpan(LinkType.ADAPTER_OFF, mActivity)));
-        SpannableString adapterOffStatus = SpanApplier.applySpans(
-                mActivity.getString(R.string.bluetooth_adapter_off_help),
-                new SpanInfo("<link>", "</link>",
-                        new BluetoothClickableSpan(LinkType.ADAPTER_OFF_HELP, mActivity)));
 
-        mItemChooserDialog.setErrorState(adapterOffMessage, adapterOffStatus);
+        mItemChooserDialog.setErrorState(adapterOffMessage, mAdapterOffStatus);
     }
 
     @CalledByNative