Revert 239784 "Make page_cycler.py fully measure memory for each..."

trunk/src/tools/telemetry/telemetry/core/platform/android_platform_backend.py

Index: trunk/src/tools/telemetry/telemetry/core/platform/android_platform_backend.py
===================================================================
--- trunk/src/tools/telemetry/telemetry/core/platform/android_platform_backend.py	(revision 239788)
+++ trunk/src/tools/telemetry/telemetry/core/platform/android_platform_backend.py	(working copy)
@@ -11,7 +11,6 @@
 from telemetry.core import platform
 from telemetry.core import util
 from telemetry.core.platform import proc_supporting_platform_backend
-from telemetry.core.platform.profiler import android_prebuilt_profiler_helper
 
 # Get build/android scripts into our path.
 util.AddDirToPythonPath(util.GetChromiumSrcDir(), 'build', 'android')
@@ -110,19 +109,8 @@
       return {}
     return super(AndroidPlatformBackend, self).GetCpuTimestamp()
 
-  def PurgeUnpinnedMemory(self):
-    """Purges the unpinned ashmem memory for the whole system.
-
-    This can be used to make memory measurements more stable in particular.
-    """
-    android_prebuilt_profiler_helper.InstallOnDevice(self._adb, 'purge_ashmem')
-    if self._adb.RunShellCommand(
-        android_prebuilt_profiler_helper.GetDevicePath('purge_ashmem'),
-        log_result=True):
-      return
-    raise Exception('Error while purging ashmem.')
-
   def GetMemoryStats(self, pid):
+    self._adb.PurgeUnpinnedAshmem()
     memory_usage = self._adb.GetMemoryUsageForPid(pid)[0]
     return {'ProportionalSetSize': memory_usage['Pss'] * 1024,
             'SharedDirty': memory_usage['Shared_Dirty'] * 1024,