bluetooth: Add RSSI icon for bluetooth choosers.

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 13b491ae759cf2d9710fb10a694b6714954c3586..58ac77967ca6b7afc8ccbfeb684878c2345970e9 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java
@@ -76,6 +76,8 @@ public class BluetoothChooserDialog
     Drawable mConnectedIcon;
     @VisibleForTesting
     String mConnectedIconDescription;
+    @VisibleForTesting
+    Drawable[] mSignalStrengthLevelIcon;
 
     // A pointer back to the native part of the implementation for this dialog.
     long mNativeBluetoothChooserDialogPtr;
@@ -128,16 +130,17 @@ public class BluetoothChooserDialog
         mNativeBluetoothChooserDialogPtr = nativeBluetoothChooserDialogPtr;
         mAdapter = BluetoothAdapter.getDefaultAdapter();
 
-        Resources res = mActivity.getResources();
-
         // Initialize icons.
-        mConnectedIcon = VectorDrawableCompat.create(
-                res, R.drawable.ic_bluetooth_connected, mActivity.getTheme());
-        DrawableCompat.setTintList(mConnectedIcon,
-                ApiCompatibilityUtils.getColorStateList(res, R.color.item_chooser_row_icon_color));
-
+        mConnectedIcon = getIconWithRowIconColorStateList(R.drawable.ic_bluetooth_connected);
         mConnectedIconDescription = mActivity.getString(R.string.bluetooth_device_connected);
 
+        mSignalStrengthLevelIcon = new Drawable[] {
+                getIconWithRowIconColorStateList(R.drawable.ic_signal_cellular_0_bar),
+                getIconWithRowIconColorStateList(R.drawable.ic_signal_cellular_1_bar),
+                getIconWithRowIconColorStateList(R.drawable.ic_signal_cellular_2_bar),
+                getIconWithRowIconColorStateList(R.drawable.ic_signal_cellular_3_bar),
+                getIconWithRowIconColorStateList(R.drawable.ic_signal_cellular_4_bar)};
+
         if (mAdapter == null) {
             Log.i(TAG, "BluetoothChooserDialog: Default Bluetooth adapter not found.");
         }
@@ -147,6 +150,15 @@ public class BluetoothChooserDialog
                                 new BluetoothClickableSpan(LinkType.ADAPTER_OFF_HELP, mActivity)));
     }
 
+    private Drawable getIconWithRowIconColorStateList(int icon) {
+        Resources res = mActivity.getResources();
+
+        Drawable drawable = VectorDrawableCompat.create(res, icon, mActivity.getTheme());
+        DrawableCompat.setTintList(drawable,
+                ApiCompatibilityUtils.getColorStateList(res, R.color.item_chooser_row_icon_color));
+        return drawable;
+    }
+
     /**
      * Show the BluetoothChooserDialog.
      */
@@ -373,12 +385,18 @@ public class BluetoothChooserDialog
 
     @VisibleForTesting
     @CalledByNative
-    void addOrUpdateDevice(String deviceId, String deviceName, boolean isGATTConnected) {
+    void addOrUpdateDevice(
+            String deviceId, String deviceName, boolean isGATTConnected, int signalStrengthLevel) {
         Drawable icon = null;
         String iconDescription = null;
         if (isGATTConnected) {
             icon = mConnectedIcon.getConstantState().newDrawable();
             iconDescription = mConnectedIconDescription;
+        } else if (signalStrengthLevel != -1) {
+            icon = mSignalStrengthLevelIcon[signalStrengthLevel].getConstantState().newDrawable();
+            iconDescription = mActivity.getResources().getQuantityString(
+                    R.plurals.signal_strength_level_n_bars, signalStrengthLevel,
+                    signalStrengthLevel);
         }
 
         mItemChooserDialog.addOrUpdateItem(deviceId, deviceName, icon, iconDescription);