[Telemetry] Combine SysfsPlatformBackend into LinuxBasedPlatformBackend.

tools/telemetry/telemetry/core/platform/cros_sysfs_platform.py

Index: tools/telemetry/telemetry/core/platform/cros_sysfs_platform.py
diff --git a/tools/telemetry/telemetry/core/platform/cros_sysfs_platform.py b/tools/telemetry/telemetry/core/platform/cros_sysfs_platform.py
deleted file mode 100644
index ae2be47eebae344c39ad577727036dfac4c24ea8..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/core/platform/cros_sysfs_platform.py
+++ /dev/null
@@ -1,49 +0,0 @@
-# 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.
-
-from telemetry.core.platform import sysfs_platform
-
-
-class CrosSysfsPlatform(sysfs_platform.SysfsPlatform):
-  """A SysfsPlatform implementation to be used for ChromeOS devices."""
-  def __init__(self, cri):
-    """Constructor.
-
-    Args:
-        cri: Chrome interface.
-    """
-    super(CrosSysfsPlatform, self).__init__()
-    self._cri = cri
-
-  def RunShellCommand(self, command):
-    return self._cri.RunCmdOnDevice(command.split())[0]
-
-  @staticmethod
-  def ParseStateSample(sample):
-    sample_stats = {}
-    for cpu in sample:
-      values = sample[cpu].splitlines()
-      # There are three values per state after excluding the single time value.
-      num_states = (len(values) - 1) / 3
-      names = values[:num_states]
-      times = values[num_states:2 * num_states]
-      latencies = values[2 * num_states:]
-      # The last line in the sample contains the time.
-      cstates = {'C0': int(values[-1]) * 10 ** 6}
-      for i, state in enumerate(names):
-        if names[i] == 'POLL' and not int(latencies[i]):
-          # C0 state. Kernel stats aren't right, so calculate by
-          # subtracting all other states from total time (using epoch
-          # timer since we calculate differences in the end anyway).
-          # NOTE: Only x86 lists C0 under cpuidle, ARM does not.
-          continue
-        cstates['C0'] -= int(times[i])
-        if names[i] == '<null>':
-          # Kernel race condition that can happen while a new C-state gets
-          # added (e.g. AC->battery). Don't know the 'name' of the state
-          # yet, but its 'time' would be 0 anyway.
-          continue
-        cstates[state] = int(times[i])
-      sample_stats[cpu] = cstates
-    return sample_stats