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

Reason for revert: UNADDRESSABLE ACCESS reported on memory bot. See crbug.com/403070 for more details.

> Content browsertest for verifying that a black frame is sent on a peerconnection if a track is disabled.
> 
> BUG=398844,403070
> 
> Review URL: https://codereview.chromium.org/442313002

TBR=perkj@chromium.org

Review URL: https://codereview.chromium.org/466983002

Cr-Commit-Position: refs/heads/master@{#289083}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289083 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/media/webrtc_browsertest.cc

@@ -123,13 +123,6 @@ IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
   MakeTypicalPeerConnectionCall(javascript);
 }
 
-IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
-                       CanSetupVideoCallAndDisableLocalVideo) {
-  const std::string javascript =
-      "callAndDisableLocalVideo({video: true});";
-  MakeTypicalPeerConnectionCall(javascript);
-}
-
 IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
                        CanSetupVideoCallWith16To9AspectRatio) {
   const std::string javascript =

content/test/data/media/peerconnection-call.html

@@ -58,20 +58,6 @@
     waitForVideo('remote-view-2');
   }
 
-  // Test that we can setup a call with a video track and that the remote peer
-  // receives black frames if the local video track is disabled.
-  function callAndDisableLocalVideo(constraints) {
-    createConnections(null);
-    navigator.webkitGetUserMedia(constraints,
-        addStreamToBothConnectionsAndNegotiate, printGetUserMediaError);
-    detectVideoPlaying('remote-view-1',
-        function () {
-          assertEquals(gLocalStream.getVideoTracks().length, 1);
-          gLocalStream.getVideoTracks()[0].enabled = false;
-          waitForBlackVideo('remote-view-1');
-        });
-  }
-
   // Test that we can setup call with an audio and video track and check that
   // the video resolution is as expected.
   function callAndExpectResolution(constraints,

content/test/data/media/webrtc_test_utilities.js

@@ -52,14 +52,6 @@ function detectVideoStopped(videoElementName, callback) {
               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 @@ function waitForVideoToStop(videoElement) {
   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 @@ function isVideoPlaying(pixels, previousPixels) {
   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).