Revert of [Android] Migrate DeviceUtils.GetMemoryUsageForPid to adb_wrapper.

build/android/pylib/device/device_utils.py

Index: build/android/pylib/device/device_utils.py
diff --git a/build/android/pylib/device/device_utils.py b/build/android/pylib/device/device_utils.py
index e89215c43baae38c6f4aa00caa29910a9e9fc464..5dca0e5b8abc6096476c9fdb362676f3e37d72f6 100644
--- a/build/android/pylib/device/device_utils.py
+++ b/build/android/pylib/device/device_utils.py
@@ -8,8 +8,6 @@
 """
 # pylint: disable=unused-argument
 
-import collections
-import itertools
 import logging
 import multiprocessing
 import os
@@ -1308,54 +1306,14 @@
       retries: number of retries
 
     Returns:
-      A dict containing memory usage statistics for the PID. May include:
-        Size, Rss, Pss, Shared_Clean, Shared_Dirty, Private_Clean,
-        Private_Dirty, VmHWM
-
-    Raises:
-      CommandTimeoutError on timeout.
-    """
-    result = collections.defaultdict(int)
-
-    try:
-      result.update(self._GetMemoryUsageForPidFromSmaps(pid))
-    except device_errors.CommandFailedError:
-      logging.exception('Error getting memory usage from smaps')
-
-    try:
-      result.update(self._GetMemoryUsageForPidFromStatus(pid))
-    except device_errors.CommandFailedError:
-      logging.exception('Error getting memory usage from status')
-
-    return result
-
-  def _GetMemoryUsageForPidFromSmaps(self, pid):
-    SMAPS_COLUMNS = (
-        'Size', 'Rss', 'Pss', 'Shared_Clean', 'Shared_Dirty', 'Private_Clean',
-        'Private_Dirty')
-
-    showmap_out = self.RunShellCommand(
-        ['showmap', str(pid)], as_root=True, check_return=True)
-    if not showmap_out:
-      raise device_errors.CommandFailedError('No output from showmap')
-
-    split_totals = showmap_out[-1].split()
-    if (not split_totals
-        or len(split_totals) != 9
-        or split_totals[-1] != 'TOTAL'):
-      raise device_errors.CommandFailedError(
-          'Invalid output from showmap: %s' % '\n'.join(showmap_out))
-
-    return dict(itertools.izip(SMAPS_COLUMNS, (int(n) for n in split_totals)))
-
-  def _GetMemoryUsageForPidFromStatus(self, pid):
-    for line in self.ReadFile(
-        '/proc/%s/status' % str(pid), as_root=True).splitlines():
-      if line.startswith('VmHWM:'):
-        return {'VmHWM': int(line.split()[1])}
-    else:
-      raise device_errors.CommandFailedError(
-          'Could not find memory peak value for pid %s', str(pid))
+      A 2-tuple containing:
+        - A dict containing the overall memory usage statistics for the PID.
+        - A dict containing memory usage statistics broken down by mapping.
+
+    Raises:
+      CommandTimeoutError on timeout.
+    """
+    return self.old_interface.GetMemoryUsageForPid(pid)
 
   @decorators.WithTimeoutAndRetriesFromInstance()
   def GetLogcatMonitor(self, timeout=None, retries=None, *args, **kwargs):