Index: build/android/flag_changer.py |
diff --git a/build/android/flag_changer.py b/build/android/flag_changer.py |
new file mode 100644 |
index 0000000000000000000000000000000000000000..636022b9abd80b6a21b2d702b1a53fea956cb5c6 |
--- /dev/null |
+++ b/build/android/flag_changer.py |
@@ -0,0 +1,50 @@ |
+#!/usr/bin/python |
+# Copyright (c) 2011 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. |
+ |
+ |
+# Location where chrome reads command line flags from |
+CHROME_COMMAND_FILE = '/data/local/chrome-command-line' |
+ |
+ |
+class FlagChanger(object): |
+ """Temporarily changes the flags Chrome runs with.""" |
+ |
+ def __init__(self, android_cmd): |
+ self._android_cmd = android_cmd |
+ self._old_flags = None |
+ |
+ def Set(self, flags, append=False): |
+ """Sets the command line flags used when chrome is started. |
+ |
+ Args: |
+ flags: A list of flags to set, eg. ['--single-process']. |
+ append: Whether to append to existing flags or overwrite them. |
+ """ |
+ if flags: |
+ assert flags[0] != 'chrome' |
+ |
+ if not self._old_flags: |
+ self._old_flags = self._android_cmd.GetFileContents(CHROME_COMMAND_FILE) |
+ if self._old_flags: |
+ self._old_flags = self._old_flags[0].strip() |
+ |
+ if append and self._old_flags: |
+ # Avoid appending flags that are already present. |
+ new_flags = filter(lambda flag: self._old_flags.find(flag) == -1, flags) |
+ self._android_cmd.SetFileContents(CHROME_COMMAND_FILE, |
+ self._old_flags + ' ' + |
+ ' '.join(new_flags)) |
+ else: |
+ self._android_cmd.SetFileContents(CHROME_COMMAND_FILE, |
+ 'chrome ' + ' '.join(flags)) |
+ |
+ def Restore(self): |
+ """Restores the flags to their original state.""" |
+ if self._old_flags == None: |
+ return # Set() was never called. |
+ elif self._old_flags: |
+ self._android_cmd.SetFileContents(CHROME_COMMAND_FILE, self._old_flags) |
+ else: |
+ self._android_cmd.RunShellCommand('rm ' + CHROME_COMMAND_FILE) |