Bug 1291997 - add media related dom exceptions; r=bz

MozReview-Commit-ID: Def98wbKxGI

--HG--
extra : transplant_source : 6%F3%9F%F7%CF%CD%28G%CB%93I%3E%F8%12%C9km%95%E8f

dom/base/domerr.msg

@@ -162,3 +162,8 @@ DOM4_MSG_DEF(InvalidStateError, "A subscription with a different application ser
 
 DOM_MSG_DEF(NS_ERROR_DOM_JS_EXCEPTION, "A callback threw an exception")
 DOM_MSG_DEF(NS_ERROR_DOM_DOMEXCEPTION, "A DOMException was thrown")
+
+/* Media errors */
+DOM4_MSG_DEF(AbortError,        "The fetching process for the media resource was aborted by the user agent at the user's request.", NS_ERROR_DOM_MEDIA_ABORT_ERR)
+DOM4_MSG_DEF(NotAllowedError,   "The play method is not allowed by the user agent or the platform in the current context, possibly because the user denied permission.", NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR)
+DOM4_MSG_DEF(NotSupportedError, "The media resource indicated by the src attribute or assigned media provider object was not suitable.", NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR)

xpcom/base/ErrorList.h

@@ -969,6 +969,16 @@
   ERROR(NS_ERROR_DOM_PUSH_MISMATCHED_KEY_ERR,       FAILURE(6)),
 #undef MODULE
 
+  /* ======================================================================= */
+  /* 41: NS_ERROR_MODULE_DOM_MEDIA */
+  /* ======================================================================= */
+#define MODULE NS_ERROR_MODULE_DOM_MEDIA
+  /* HTMLMediaElement API errors from https://html.spec.whatwg.org/multipage/embedded-content.html#media-elements */
+  ERROR(NS_ERROR_DOM_MEDIA_ABORT_ERR,           FAILURE(1)),
+  ERROR(NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR,     FAILURE(2)),
+  ERROR(NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR,   FAILURE(3)),
+#undef MODULE
+
   /* ======================================================================= */
   /* 51: NS_ERROR_MODULE_GENERAL */
   /* ======================================================================= */

xpcom/base/nsError.h

@@ -79,6 +79,7 @@
 #define NS_ERROR_MODULE_SIGNED_APP 38
 #define NS_ERROR_MODULE_DOM_ANIM 39
 #define NS_ERROR_MODULE_DOM_PUSH 40
+#define NS_ERROR_MODULE_DOM_MEDIA 41
 
 /* NS_ERROR_MODULE_GENERAL should be used by modules that do not
  * care if return code values overlap. Callers of methods that