[MIDI] Add a permission bubble client for MIDI system control.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 8f94a343893d37eb78d87a4e29161fab7d74e981..725f6f4f93941ec10591aa63b3095a6c94209b33 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -13313,6 +13313,9 @@ Some features may be unavailable.  Please check that the profile exists and you
         $1<ex>www.google.com</ex>
       </ph> wants to get full control of your MIDI devices.
     </message>
+    <message name="IDS_MIDI_SYSEX_PERMISSION_FRAGMENT" desc="Permission asked in the permission bubble when a URL wants to access MIDI devices with system exclusive messages, along with other permissions requests. Preceded by the prompt 'This site would like to:'">
+      fully control your MIDI devices.

[Ami GONE FROM CHROMIUM, 2014/02/07 18:25:35]

Other entries look like
<message name="..." desc="...">
  Some text
</message>

but your entry looks like
<message name="..." desc="...">
  continuation of desc from above
</message>

[Greg Billock, 2014/02/10 23:57:10]

I think this is just clipping in the UI. The syntax in the file is fine, and it
compiles OK.

+    </message>
     <message name="IDS_MIDI_SYSEX_ALLOW_BUTTON" desc="A button in MIDI access infobar for allowing full access to MIDI devices for a given domain.">
       Allow
     </message>