Use local pages for webrtc telemetry tests.

tools/perf/page_sets/webrtc_cases/peerconnection_audio_files/css(1)

Index: tools/perf/page_sets/webrtc_cases/peerconnection_audio_files/css(1)
diff --git a/tools/perf/page_sets/webrtc_cases/peerconnection_audio_files/css(1) b/tools/perf/page_sets/webrtc_cases/peerconnection_audio_files/css(1)
new file mode 100644
index 0000000000000000000000000000000000000000..f130bdfa1f9fb9812015183d88ac01b91f1ac93a
--- /dev/null
+++ b/tools/perf/page_sets/webrtc_cases/peerconnection_audio_files/css(1)
@@ -0,0 +1,24 @@
+/* vietnamese */
+@font-face {
+  font-family: 'Inconsolata';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Inconsolata Regular'), local('Inconsolata-Regular'), url(https://fonts.gstatic.com/s/inconsolata/v15/BjAYBlHtW3CJxDcjzrnZCL6up8jxqWt8HVA3mDhkV_0.woff2) format('woff2');
+  unicode-range: U+0102-0103, U+1EA0-1EF9, U+20AB;
+}
+/* latin-ext */
+@font-face {
+  font-family: 'Inconsolata';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Inconsolata Regular'), local('Inconsolata-Regular'), url(https://fonts.gstatic.com/s/inconsolata/v15/BjAYBlHtW3CJxDcjzrnZCCYE0-AqJ3nfInTTiDXDjU4.woff2) format('woff2');
+  unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
+}
+/* latin */
+@font-face {
+  font-family: 'Inconsolata';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Inconsolata Regular'), local('Inconsolata-Regular'), url(https://fonts.gstatic.com/s/inconsolata/v15/BjAYBlHtW3CJxDcjzrnZCI4P5ICox8Kq3LLUNMylGO4.woff2) format('woff2');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215;
+}