Add signal strength indicator icon to WebBluetooth chooser on non-Mac desktops

ui/resources/ui_resources.grd

Index: ui/resources/ui_resources.grd
diff --git a/ui/resources/ui_resources.grd b/ui/resources/ui_resources.grd
index 6813702c7c6405013234141e5270bfac3553f382..74ee6b874faa1de526b14d1e39c3d08969d9263f 100644
--- a/ui/resources/ui_resources.grd
+++ b/ui/resources/ui_resources.grd
@@ -182,6 +182,13 @@
         <structure type="chrome_scaled_image" name="IDR_PANEL_BOTTOM_LEFT_CORNER" file="panel_bottom_left_corner.png" />
         <structure type="chrome_scaled_image" name="IDR_PANEL_BOTTOM_RIGHT_CORNER" file="panel_bottom_right_corner.png" />
       </if>
+      <if expr="not is_android and not is_ios">
+        <structure type="chrome_scaled_image" name="IDR_SIGNAL_0_BAR" file="common/signal_0_bar.png" />
+        <structure type="chrome_scaled_image" name="IDR_SIGNAL_1_BAR" file="common/signal_1_bar.png" />
+        <structure type="chrome_scaled_image" name="IDR_SIGNAL_2_BAR" file="common/signal_2_bar.png" />
+        <structure type="chrome_scaled_image" name="IDR_SIGNAL_3_BAR" file="common/signal_3_bar.png" />
+        <structure type="chrome_scaled_image" name="IDR_SIGNAL_4_BAR" file="common/signal_4_bar.png" />
+      </if>
       <if expr="use_aura">
         <structure type="chrome_scaled_image" name="IDR_TEXT_SELECTION_HANDLE_CENTER" file="common/text_selection_handle_center.png" />
         <structure type="chrome_scaled_image" name="IDR_TEXT_SELECTION_HANDLE_LEFT" file="common/text_selection_handle_left.png" />