Remove WebRTC-LocalIPPermissionCheck as it seems to no longer be used.

Bug: 1126640
Change-Id: I15f954580b9d6bb4ed692183dacbd51917b4e149
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427355Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Caitlin Fischer <caitlinfischer@google.com>
Cr-Commit-Position: refs/heads/master@{#810175}

content/renderer/renderer_blink_platform_impl.cc

@@ -583,21 +583,10 @@ media::MediaPermission* RendererBlinkPlatformImpl::GetWebRTCMediaPermission(
   DCHECK(ShouldEnforceWebRTCRoutingPreferences());
 
   media::MediaPermission* media_permission = nullptr;
-  bool create_media_permission =
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnforceWebRtcIPPermissionCheck);
-  create_media_permission =
-      create_media_permission ||
-      !StartsWith(
-          base::FieldTrialList::FindFullName("WebRTC-LocalIPPermissionCheck"),
-          "Disabled", base::CompareCase::SENSITIVE);
-  if (create_media_permission) {
   RenderFrameImpl* render_frame = RenderFrameImpl::FromWebFrame(web_frame);
   if (render_frame)
     media_permission = render_frame->GetMediaPermission();
   DCHECK(media_permission);
-  }
-
   return media_permission;
 }
 

testing/variations/fieldtrial_testing_config.json

@@ -7820,23 +7820,6 @@
             ]
         }
     ],
-    "WebRTC-LocalIPPermissionCheck": [
-        {
-            "platforms": [
-                "android",
-                "android_weblayer",
-                "chromeos",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled"
-                }
-            ]
-        }
-    ],
     "WebRTC-Pacer-BlockAudio": [
         {
             "platforms": [