[telemetry] Sort imports in Telemetry and its dependents.

tools/telemetry/telemetry/core/_bitmap.py

 # Copyright 2013 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.
 
 """
 Bitmap is a basic wrapper for image pixels. It includes some basic processing
 tools: crop, find bounding box of a color and compute histogram of color values.
 """
 
 import array
 import base64
 import cStringIO
 import struct
 import subprocess
 
+from telemetry.core import platform
 from telemetry.core import util
-from telemetry.core import platform
 from telemetry.image_processing import histogram
 from telemetry.image_processing import rgba_color
 from telemetry.util import support_binaries
 
 util.AddDirToPythonPath(util.GetTelemetryDir(), 'third_party', 'png')
 import png  # pylint: disable=F0401
 
 
 class _BitmapTools(object):
   """Wraps a child process of bitmaptools and allows for one command."""
@@ skipping 199 matching lines @@
     if (left < 0 or top < 0 or
         (left + width) > cur_width or
         (top + height) > cur_height):
       raise ValueError('Invalid dimensions')
 
     self._crop_box = cur_left + left, cur_top + top, width, height
     return self
 
   def ColorHistogram(self, ignore_color=None, tolerance=0):
     return self._PrepareTools().Histogram(ignore_color, tolerance)