chromeos: Add support for multiple volume icons.

chrome/app/theme/theme_resources.grd

Index: chrome/app/theme/theme_resources.grd
diff --git a/chrome/app/theme/theme_resources.grd b/chrome/app/theme/theme_resources.grd
index 1f066d925fe6344cc6a9b82404e14f8c462ddb9a..df00c32fc72cda44cb7773f7266a55eca2e15108 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -584,7 +584,9 @@
         <include name="IDR_USER_IMAGE_RECYCLE" file="discard_wide.png" type="BINDATA" />
         <include name="IDR_USER_IMAGE_CAPTURE_DISABLED" file="snapshot_wide_disabled.png" type="BINDATA" />
         <include name="IDR_USER_IMAGE_INITIALIZING" file="initializing_video.png" type="BINDATA" />
-        <include name="IDR_VOLUMEBUBBLE_ICON" file="volume_icon.png" type="BINDATA" />
+        <include name="IDR_VOLUME_BUBBLE_UP_ICON" file="volume_up_icon.png" type="BINDATA" />
+        <include name="IDR_VOLUME_BUBBLE_DOWN_ICON" file="volume_down_icon.png" type="BINDATA" />
+        <include name="IDR_VOLUME_BUBBLE_MUTE_ICON" file="volume_mute_icon.png" type="BINDATA" />
         <include name="IDR_SCROLL_BACKGROUND" file="chromeos_scroll_background.png" type="BINDATA" />
         <include name="IDR_SCROLL_BACKGROUND_BORDER_UP" file="chromeos_scroll_background_border_up.png" type="BINDATA" />
         <include name="IDR_SCROLL_BACKGROUND_BORDER_DOWN" file="chromeos_scroll_background_border_down.png" type="BINDATA" />