Performance measures of old and new RTCPeerConnection.getStats added.

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 d232889106d41036fd8bd191f11b1aa6336317b1..5ddf0ad6b5a608d09878c6f382f165c7de436d4c 100644
--- a/chrome/browser/media/webrtc/webrtc_browsertest_base.cc
+++ b/chrome/browser/media/webrtc/webrtc_browsertest_base.cc
@@ -6,10 +6,13 @@
 
 #include <stddef.h>
 
+#include <limits>
+
 #include "base/json/json_reader.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
@@ -497,6 +500,17 @@ std::vector<std::string> WebRtcTestBase::VerifyStatsGeneratedPromise(
   return JsonArrayToVectorOfStrings(result.substr(3));
 }
 
+double WebRtcTestBase::MeasureGetStatsCallbackPerformance(
+    content::WebContents* tab) const {
+  std::string result = ExecuteJavascript(
+      "measureGetStatsCallbackPerformance()", tab);
+  EXPECT_TRUE(base::StartsWith(result, "ok-", base::CompareCase::SENSITIVE));
+  double ms;
+  if (!base::StringToDouble(result.substr(3), &ms))
+    return std::numeric_limits<double>::infinity();
+  return ms;
+}
+
 scoped_refptr<content::TestStatsReportDictionary>
 WebRtcTestBase::GetStatsReportDictionary(content::WebContents* tab) const {
   std::string result = ExecuteJavascript("getStatsReportDictionary()", tab);
@@ -512,6 +526,16 @@ WebRtcTestBase::GetStatsReportDictionary(content::WebContents* tab) const {
           std::unique_ptr<base::DictionaryValue>(dictionary)));
 }
 
+double WebRtcTestBase::MeasureGetStatsPerformance(
+    content::WebContents* tab) const {
+  std::string result = ExecuteJavascript("measureGetStatsPerformance()", tab);
+  EXPECT_TRUE(base::StartsWith(result, "ok-", base::CompareCase::SENSITIVE));
+  double ms;
+  if (!base::StringToDouble(result.substr(3), &ms))
+    return std::numeric_limits<double>::infinity();
+  return ms;
+}
+
 std::vector<std::string> WebRtcTestBase::GetWhitelistedStatsTypes(
     content::WebContents* tab) const {
   return JsonArrayToVectorOfStrings(