Use --ignore-certificate-errors for webview

telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py

Index: telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py
diff --git a/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py b/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py
index b7b5abaf4a6dad4b41446d62b141b37357470314..25901ec9324c6269af991420eb7fb545a2d1e859 100644
--- a/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py
+++ b/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py
@@ -133,6 +133,12 @@ class ChromeBrowserBackend(browser_backend.BrowserBackend):
 
     return args
 
+  # TODO(crbug.com/753948): remove this property once webview supports
+  # --ignore-certificate-errors-spki-list.
+  @property
+  def is_webview(self):
+    return False
+
   def GetReplayBrowserStartupArgs(self):
     replay_args = []
     network_backend = self.platform_backend.network_controller_backend
@@ -140,7 +146,7 @@ class ChromeBrowserBackend(browser_backend.BrowserBackend):
       return []
     proxy_port = network_backend.forwarder.port_pair.remote_port
     replay_args.append('--proxy-server=socks://localhost:%s' % proxy_port)
-    if not network_backend.is_test_ca_installed:
+    if not network_backend.is_test_ca_installed and not self.is_webview:
       # Ignore certificate errors for certs that are signed with Wpr's root.
       # For more details on this flag, see crbug.com/753948.
       wpr_public_hash_file = os.path.join(util.GetCatapultDir(),
@@ -153,6 +159,10 @@ class ChromeBrowserBackend(browser_backend.BrowserBackend):
         wpr_public_hash = f.readline().strip()
         replay_args.append('--ignore-certificate-errors-spki-list=' +
                            wpr_public_hash)
+    elif not network_backend.is_test_ca_installed and self.is_webview:
+      # --ignore-certificate-errors-spki-list doesn't work with webview yet
+      # (crbug.com/753948)
+      replay_args.append('--ignore-certificate-errors')
     return replay_args
 
   def HasBrowserFinishedLaunching(self):