Codemirror: Add vhdl mode

Verilog mode was always supported by Codemirror, but support for VHDL
was only added in recent Codemirror version, so that we can only
include it now.

Bug: Issue 3447
Change-Id: I91028acf3f41f51981f710db00bee9a8c9398aee

gerrit-gwtui/src/main/java/net/codemirror/mode/ModeInfo.java

@@ -75,6 +75,7 @@ public class ModeInfo extends JavaScriptObject {
       Modes.I.stex(),
       Modes.I.velocity(),
       Modes.I.verilog(),
+      Modes.I.vhdl(),
       Modes.I.xml(),
       Modes.I.yaml(),
     });

gerrit-gwtui/src/main/java/net/codemirror/mode/Modes.java

@@ -61,6 +61,7 @@ public interface Modes extends ClientBundle {
   @Source("tcl.js") @DoNotEmbed DataResource tcl();
   @Source("velocity.js") @DoNotEmbed DataResource velocity();
   @Source("verilog.js") @DoNotEmbed DataResource verilog();
+  @Source("vhdl.js") @DoNotEmbed DataResource vhdl();
   @Source("xml.js") @DoNotEmbed DataResource xml();
   @Source("yaml.js") @DoNotEmbed DataResource yaml();
 

gerrit-server/src/main/resources/com/google/gerrit/server/mime/mime-types.properties

@@ -48,5 +48,6 @@ stex = text/x-stex
 v = text/x-verilog
 vert = x-shader/x-vertex
 vh = text/x-verilog
+vhdl = text/x-vhdl
 vm = text/velocity
 yaml = text/x-yaml

lib/codemirror/cm.defs

@@ -81,6 +81,7 @@ CM_MODES = [
   'tcl',
   'velocity',
   'verilog',
+  'vhdl',
   'xml',
   'yaml',
 ]