adb_profile_chrome: Make trace file path a clickable URL

NOTRY=true

Review URL: https://codereview.chromium.org/191713003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255965 0039d316-1c4b-4281-b951-d872f2087c98

build/android/adb_profile_chrome.py

@@ -250,7 +250,7 @@ def _PullTraces(controllers, output, compress, write_json):
     result = trace_files[0]
 
   _PrintMessage('done')
-  _PrintMessage('Trace written to %s' % os.path.abspath(result))
+  _PrintMessage('Trace written to file://%s' % os.path.abspath(result))
   return result