RTCPeerConnection.addTrack and removeTrack added (behind flag)

chrome/browser/media/webrtc/webrtc_browsertest_base.cc

Index: chrome/browser/media/webrtc/webrtc_browsertest_base.cc
diff --git a/chrome/browser/media/webrtc/webrtc_browsertest_base.cc b/chrome/browser/media/webrtc/webrtc_browsertest_base.cc
index 1d76576bbd0ad7562172c7f5d6b7ed95eda0afe5..df5eb4ac07a86df4540b893fc645cfb607df1d47 100644
--- a/chrome/browser/media/webrtc/webrtc_browsertest_base.cc
+++ b/chrome/browser/media/webrtc/webrtc_browsertest_base.cc
@@ -13,6 +13,7 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
@@ -595,3 +596,37 @@ void WebRtcTestBase::VerifyRtpReceivers(
                           : "verifyRtpReceivers()";
   EXPECT_EQ("ok-receivers-verified", ExecuteJavascript(javascript, tab));
 }
+
+std::vector<std::string> WebRtcTestBase::CreateAndAddAudioAndVideoTrack(
+    content::WebContents* tab,
+    StreamArgumentType stream_argument_type) const {
+  const char* string_argument_type_str = nullptr;
+  switch (stream_argument_type) {
+    case StreamArgumentType::NO_STREAM:
+      string_argument_type_str = "'no-stream'";
+      break;
+    case StreamArgumentType::SHARED_STREAM:
+      string_argument_type_str = "'shared-stream'";
+      break;
+    case StreamArgumentType::INDIVIDUAL_STREAMS:
+      string_argument_type_str = "'individual-streams'";
+      break;
+  }
+  std::string result =
+      ExecuteJavascript(base::StringPrintf("createAndAddAudioAndVideoTrack(%s)",
+                                           string_argument_type_str),
+                        tab);
+  EXPECT_TRUE(base::StartsWith(result, "ok-", base::CompareCase::SENSITIVE));
+  std::vector<std::string> ids = base::SplitString(
+      result.substr(3), " ", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
+  EXPECT_EQ(4u, ids.size());
+  return ids;
+}
+
+void WebRtcTestBase::RemoveTrack(content::WebContents* tab,
+                                 const std::string& track_id) const {
+  EXPECT_EQ(
+      "ok-sender-removed",
+      ExecuteJavascript(
+          base::StringPrintf("removeTrack('%s')", track_id.c_str()), tab));
+}