Fix testCrashSymbols with PlzNavigate.

tools/perf/core/stacktrace_unittest.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import tempfile
 import os
 
 from telemetry.core import exceptions
 from telemetry import decorators
 from telemetry.testing import tab_test_case
@@ skipping 18 matching lines @@
       self._tab.Navigate('chrome://crash', timeout=5)
     self.assertIn('CrashIntentionally', '\n'.join(c.exception.stack_trace))
 
   # Some platforms do not support full stack traces, this test requires only
   # minimal symbols to be available.
   @decorators.Enabled('mac', 'linux', 'win')
   @decorators.Disabled('snowleopard')
   def testCrashMinimalSymbols(self):
     with self.assertRaises(exceptions.DevtoolsTargetCrashException) as c:
       self._tab.Navigate('chrome://crash', timeout=5)
-    self.assertIn('OnNavigate', '\n'.join(c.exception.stack_trace))
+    self.assertIn('PrepareRenderViewForNavigation',
+                  '\n'.join(c.exception.stack_trace))
 
   # The breakpad file specific test only apply to platforms which use the
   # breakpad symbol format. This also must be tested in isolation because it can
   # potentially interfere with other tests symbol parsing.
   @decorators.Enabled('mac', 'linux')
   @decorators.Isolated
   def testBadBreakpadFileIgnored(self):
     # pylint: disable=protected-access
     executable_path = self._browser._browser_backend._executable
     executable = os.path.basename(executable_path)
@@ skipping 10 matching lines @@
       tmp_dir = os.path.join(self._browser._browser_backend._tmp_minidump_dir)
       symbol_dir = os.path.join(tmp_dir, 'symbols')
       self.assertTrue(os.path.isdir(symbol_dir))
 
       # Bad breakpad file should not be in the symbol directory
       garbage_symbol_dir = os.path.join(symbol_dir, executable, garbage_hash)
       self.assertFalse(os.path.isdir(garbage_symbol_dir))
 
       # Stack trace should still work.
       self.assertIn('CrashIntentionally', '\n'.join(c.exception.stack_trace))