Bug 1186261: Disable mediasource-config-change-webm* tests. r=karlt

Those tests do not properly check that mediasource is not available and do not behave in a reliable fashion.

testing/web-platform/meta/media-source/mediasource-config-change-webm-a-bitrate.html.ini

@@ -1,6 +1,9 @@
 [mediasource-config-change-webm-a-bitrate.html]
   type: testharness
   prefs: [media.mediasource.enabled:true, media.mediasource.whitelist:false]
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
+    if (os == "win") and (version == "5.1.2600"): https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
   [Tests webm audio-only bitrate changes.]
     expected: FAIL
 

testing/web-platform/meta/media-source/mediasource-config-change-webm-av-framesize.html.ini

@@ -1,6 +1,9 @@
 [mediasource-config-change-webm-av-framesize.html]
   type: testharness
   prefs: [media.mediasource.enabled:true, media.mediasource.whitelist:false]
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
+    if (os == "win") and (version == "5.1.2600"): https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
   [Tests webm frame size changes in multiplexed content.]
     expected: FAIL
 

testing/web-platform/meta/media-source/mediasource-config-change-webm-v-bitrate.html.ini

@@ -1,6 +1,9 @@
 [mediasource-config-change-webm-v-bitrate.html]
   type: testharness
   prefs: [media.mediasource.enabled:true, media.mediasource.whitelist:false]
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
+    if (os == "win") and (version == "5.1.2600"): https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
   [Tests webm video-only bitrate changes.]
     expected: FAIL
 

testing/web-platform/meta/media-source/mediasource-config-change-webm-v-framerate.html.ini

@@ -1,6 +1,9 @@
 [mediasource-config-change-webm-v-framerate.html]
   type: testharness
   prefs: [media.mediasource.enabled:true, media.mediasource.whitelist:false]
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
+    if (os == "win") and (version == "5.1.2600"): https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
   [Tests webm video-only frame rate changes.]
     expected: FAIL
 

testing/web-platform/meta/media-source/mediasource-config-change-webm-v-framesize.html.ini

@@ -1,6 +1,9 @@
 [mediasource-config-change-webm-v-framesize.html]
   type: testharness
   prefs: [media.mediasource.enabled:true, media.mediasource.whitelist:false]
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
+    if (os == "win") and (version == "5.1.2600"): https://bugzilla.mozilla.org/show_bug.cgi?id=1186261
   [Tests webm video-only frame size changes.]
     expected: FAIL