Revert 288702 "Content browsertest for verifying that a black fr..."

trunk/src/content/test/data/media/webrtc_test_utilities.js

Index: trunk/src/content/test/data/media/webrtc_test_utilities.js
===================================================================
--- trunk/src/content/test/data/media/webrtc_test_utilities.js	(revision 289082)
+++ trunk/src/content/test/data/media/webrtc_test_utilities.js	(working copy)
@@ -52,14 +52,6 @@
               callback);
 }
 
-function detectBlackVideo(videoElementName, callback) {
-  detectVideo(videoElementName,
-              function (pixels, previous_pixels) {
-                return isVideoBlack(pixels);
-              },
-              callback);
-}
-
 function detectVideo(videoElementName, predicate, callback) {
   console.log('Looking at video in element ' + videoElementName);
 
@@ -105,11 +97,6 @@
   detectVideoStopped(videoElement, function () { eventOccured(); });
 }
 
-function waitForBlackVideo(videoElement) {
-  addExpectedEvent();
-  detectBlackVideo(videoElement, function () { eventOccured(); });
-}
-
 // Calculates the current frame rate and compares to |expected_frame_rate|
 // |callback| is triggered with value |true| if the calculated frame rate
 // is +-1 the expected or |false| if five calculations fail to match
@@ -184,16 +171,6 @@
   return false;
 }
 
-function isVideoBlack(pixels) {
-  for (var i = 0; i < pixels.length; i++) {
-    // |pixels| is in RGBA. Ignore the alpha channel.
-    if (pixels[i] != 0 && (i + 1) % 4 != 0) {
-      return false;
-    }
-  }
-  return true;
-}
-
 // This function matches |left| and |right| and fails the test if the
 // values don't match using normal javascript equality (i.e. the hard
 // types of the operands aren't checked).