Update usage of Proguard in clank after moving Proguard to third_party.

build/android/pylib/utils/proguard.py

 # Copyright 2014 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 os
 import re
 import tempfile
 
 from pylib import constants
 from pylib import cmd_helper
 
 
 _PROGUARD_CLASS_RE = re.compile(r'\s*?- Program class:\s*([\S]+)$')
 _PROGUARD_SUPERCLASS_RE = re.compile(r'\s*?  Superclass:\s*([\S]+)$')
 _PROGUARD_SECTION_RE = re.compile(
     r'^(?:Interfaces|Constant Pool|Fields|Methods|Class file attributes) '
     r'\(count = \d+\):$')
 _PROGUARD_METHOD_RE = re.compile(r'\s*?- Method:\s*(\S*)[(].*$')
 _PROGUARD_ANNOTATION_RE = re.compile(r'\s*?- Annotation \[L(\S*);\]:$')
 _PROGUARD_ANNOTATION_CONST_RE = (
     re.compile(r'\s*?- Constant element value.*$'))
 _PROGUARD_ANNOTATION_VALUE_RE = re.compile(r'\s*?- \S+? \[(.*)\]$')
 
 _PROGUARD_PATH_SDK = os.path.join(
-    constants.ANDROID_SDK_ROOT, 'tools', 'proguard', 'lib', 'proguard.jar')
+    constants.PROGUARD_ROOT, 'lib', 'proguard.jar')
 _PROGUARD_PATH_BUILT = (
     os.path.join(os.environ['ANDROID_BUILD_TOP'], 'external', 'proguard',
                  'lib', 'proguard.jar')
     if 'ANDROID_BUILD_TOP' in os.environ else None)
 _PROGUARD_PATH = (
     _PROGUARD_PATH_SDK if os.path.exists(_PROGUARD_PATH_SDK)
     else _PROGUARD_PATH_BUILT)
 
 
 def Dump(jar_path):
@@ skipping 103 matching lines @@
           m = _PROGUARD_ANNOTATION_VALUE_RE.match(line)
           if m:
             if method_result:
               method_result['annotations'][annotation] = m.group(1)
             else:
               class_result['annotations'][annotation] = m.group(1)
           annotation_has_value = None
 
   return results