Fixed browser crash when using Debug build:

tools/telemetry/telemetry/desktop_browser_backend.py

Index: tools/telemetry/telemetry/desktop_browser_backend.py
diff --git a/tools/telemetry/telemetry/desktop_browser_backend.py b/tools/telemetry/telemetry/desktop_browser_backend.py
index a0e3d457e4eca004084bd74bf6bc681048bc872b..3fd840024f960022f81245e20fa9c0de78d7f761 100644
--- a/tools/telemetry/telemetry/desktop_browser_backend.py
+++ b/tools/telemetry/telemetry/desktop_browser_backend.py
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os as os
+import re
 import subprocess as subprocess
 import shutil
 import tempfile
@@ -26,6 +27,7 @@ class DesktopBrowserBackend(browser_backend.BrowserBackend):
       raise Exception('Cannot create browser, no executable found!')
 
     self._port = util.GetAvailableLocalPort()
+    self._chrome_branch_number = self._GetChromeBranchNumber()
 
     args = [self._executable]
     args.extend(self.GetBrowserStartupArgs())
@@ -47,7 +49,10 @@ class DesktopBrowserBackend(browser_backend.BrowserBackend):
     args = super(DesktopBrowserBackend, self).GetBrowserStartupArgs()
     args.append('--remote-debugging-port=%i' % self._port)
     args.append('--window-size=1280,1024')
-    args.append('--enable-benchmarking')
+    if self._chrome_branch_number >= 1404:

[nduca, 2013/02/12 01:28:49]

should this be conditional on content shell, since this is a browser-only
extension?

[Danh Nguyen, 2013/02/12 15:57:26]

Done.  Made all chrome switches conditional on not being content shell.

+      args.append('--enable-net-benchmarking')
+    else:
+      args.append('--enable-benchmarking')
     if not self.options.dont_override_profile:
       self._tmpdir = tempfile.mkdtemp()
       args.append('--user-data-dir=%s' % self._tmpdir)
@@ -107,6 +112,12 @@ class DesktopBrowserBackend(browser_backend.BrowserBackend):
   def CreateForwarder(self, *port_pairs):
     return DoNothingForwarder(*port_pairs)
 
+  def _GetChromeBranchNumber(self):
+    version = subprocess.check_output([self._executable, '--version'])
+    match = re.match('[^\d]+\s+\d+\.\d+\.(\d+)\.\d+.*', version)
+    assert match
+    return int(match.group(1))
+
 class DoNothingForwarder(object):
   def __init__(self, *port_pairs):
     self._host_port = port_pairs[0].local_port