bluetooth: Add RSSI icon for bluetooth choosers.

chrome/android/javatests/src/org/chromium/chrome/browser/BluetoothChooserDialogTest.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser;
 
 import android.Manifest;
 import android.app.Dialog;
 import android.content.Intent;
 import android.content.pm.PackageManager;
@@ skipping 208 matching lines @@
 
         TextViewWithClickableSpans statusView =
                 (TextViewWithClickableSpans) dialog.findViewById(R.id.status);
         final View items = dialog.findViewById(R.id.items);
         final Button button = (Button) dialog.findViewById(R.id.positive);
         final View progress = dialog.findViewById(R.id.progress);
 
         ThreadUtils.runOnUiThreadBlocking(new Runnable() {
             @Override
             public void run() {
-                mChooserDialog.addOrUpdateDevice("id-1", "Name 1", false /* isGATTConnected */);
-                mChooserDialog.addOrUpdateDevice("id-2", "Name 2", true /* isGATTConnected */);
+                // Add non-connected device with no signal strength.
+                mChooserDialog.addOrUpdateDevice("id-1", "Name 1", false /* isGATTConnected */,
+                        -1 /* signalStrengthLevel */);
+                // Add connected device with no signal strength.
+                mChooserDialog.addOrUpdateDevice(
+                        "id-2", "Name 2", true /* isGATTConnected */, -1 /* signalStrengthLevel */);
+                // Add non-connected device with signal strength level 1.
+                mChooserDialog.addOrUpdateDevice(
+                        "id-3", "Name 3", false /* isGATTConnected */, 1 /* signalStrengthLevel */);
+                // Add connected device with signal strength level 1.
+                mChooserDialog.addOrUpdateDevice(
+                        "id-4", "Name 4", true /* isGATTConnected */, 1 /* signalStrengthLevel */);
             }
         });
 
         // After adding items to the dialog, the help message should be showing,
         // the progress spinner should disappear, the Commit button should still
         // be disabled (since nothing's selected), and the list view should
         // show.
         assertEquals(removeLinkTags(getActivity().getString(R.string.bluetooth_searching)),
                 statusView.getText().toString());
         assertFalse(button.isEnabled());
         assertEquals(View.VISIBLE, items.getVisibility());
         assertEquals(View.GONE, progress.getVisibility());
 
         ItemChooserDialog.ItemAdapter itemAdapter =
                 mChooserDialog.mItemChooserDialog.getItemAdapterForTesting();
         assertTrue(itemAdapter.getItem(0).hasSameContents(
                 "id-1", "Name 1", null /* icon */, null /* iconDescription */));
         assertTrue(itemAdapter.getItem(1).hasSameContents("id-2", "Name 2",
                 mChooserDialog.mConnectedIcon, mChooserDialog.mConnectedIconDescription));
+        assertTrue(itemAdapter.getItem(2).hasSameContents("id-3", "Name 3",
+                mChooserDialog.mSignalStrengthLevelIcon[1],
+                getActivity().getResources().getQuantityString(
+                        R.plurals.signal_strength_level_n_bars, 1, 1)));
+        // We show the connected icon even if the device has a signal strength.
+        assertTrue(itemAdapter.getItem(3).hasSameContents("id-4", "Name 4",
+                mChooserDialog.mConnectedIcon, mChooserDialog.mConnectedIconDescription));
 
         selectItem(mChooserDialog, 2);
 
         assertEquals(
                 BluetoothChooserDialog.DIALOG_FINISHED_SELECTED, mChooserDialog.mFinishedEventType);
         assertEquals("id-2", mChooserDialog.mFinishedDeviceId);
     }
 
     @LargeTest
     public void testNoLocationPermission() {
@@ skipping 210 matching lines @@
         }
 
         public boolean mSystemLocationSettingsEnabled = true;
 
         @Override
         public boolean isSystemLocationSettingEnabled() {
             return mSystemLocationSettingsEnabled;
         }
     }
 }