Parse media keys for named command in the manifest.

chrome/common/extensions/extension_manifest_constants.h

Index: chrome/common/extensions/extension_manifest_constants.h
diff --git a/chrome/common/extensions/extension_manifest_constants.h b/chrome/common/extensions/extension_manifest_constants.h
index bf38691453c35c02a402b77c1815fcd27a0f78b0..6be45d9445ff49893cc8b87d9d1a62001cbeb9e4 100644
--- a/chrome/common/extensions/extension_manifest_constants.h
+++ b/chrome/common/extensions/extension_manifest_constants.h
@@ -37,6 +37,10 @@ namespace extension_manifest_values {
   extern const char kKeyIns[];
   extern const char kKeyLeft[];
   extern const char kKeyMacCtrl[];
+  extern const char kKeyMediaNextTrack[];
+  extern const char kKeyMediaPlayPause[];
+  extern const char kKeyMediaPrevTrack[];
+  extern const char kKeyMediaStop[];
   extern const char kKeyPgDwn[];
   extern const char kKeyPgUp[];
   extern const char kKeyPeriod[];
@@ -158,6 +162,7 @@ namespace extension_manifest_errors {
   extern const char kInvalidKeyBinding[];
   extern const char kInvalidKeyBindingDescription[];
   extern const char kInvalidKeyBindingDictionary[];
+  extern const char kInvalidKeyBindingMediaKeyWithModifier[];
   extern const char kInvalidKeyBindingMissingPlatform[];
   extern const char kInvalidKeyBindingTooMany[];
   extern const char kInvalidKeyBindingUnknownPlatform[];