tools: Add a tool to load pages on a device, and pull the predictor database.

tools/android/loading/controller.py

 # Copyright 2016 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.
 
 """Controller objects that control the context in which chrome runs.
 
 This is responsible for the setup necessary for launching chrome, and for
 creating a DevToolsConnection. There are remote device and local
 desktop-specific versions.
 """
@@ skipping 321 matching lines @@
     """Overridden android device."""
     return self._device
 
   @contextlib.contextmanager
   def Open(self):
     """Overridden connection creation."""
     if self._wpr_attributes:
       assert self._wpr_attributes.chrome_env_override == {}, \
           'Remote controller doesn\'t support chrome environment variables.'
     package_info = OPTIONS.ChromePackage()
-    command_line_path = '/data/local/chrome-command-line'
+    command_line_path = '/data/local/tmp/chrome-command-line'
     self._device.ForceStop(package_info.package)
     chrome_args = self._GetChromeArguments()
     logging.info('Launching %s with flags: %s' % (package_info.package,
         subprocess.list2cmdline(chrome_args)))
     with device_setup.FlagReplacer(
         self._device, command_line_path, self._GetChromeArguments()):
       self._DismissCrashDialogIfNeeded()
       start_intent = intent.Intent(
           package=package_info.package, activity=package_info.activity,
           data='about:blank')
@@ skipping 291 matching lines @@
     if (not os.path.isdir(self._profile_dir) or
         os.listdir(self._profile_dir) == []):
       # Launch chrome so that it populates the profile directory.
       with self.Open():
         pass
     assert os.path.isdir(self._profile_dir)
     assert os.path.isdir(os.path.dirname(self._GetCacheDirectoryPath()))
 
   def _GetCacheDirectoryPath(self):
     return os.path.join(self._profile_dir, 'Default', 'Cache')