[Telemetry] Make Telemetry binaries platform aware.

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 collections
 import struct
 import subprocess
-import sys
 
 from telemetry.core import util
+from telemetry.core.platform import factory
+from telemetry.util import support_binaries
 
 util.AddDirToPythonPath(util.GetTelemetryDir(), 'third_party', 'png')
 import png  # pylint: disable=F0401
 
 
 def HistogramDistance(hist1, hist2):
   """Earth mover's distance.
 
   http://en.wikipedia.org/wiki/Earth_mover's_distance
   First, normalize the two histograms. Then, treat the two histograms as
@@ skipping 85 matching lines @@
 WHITE =                RgbaColor(255, 255, 255)
 
 
 class _BitmapTools(object):
   """Wraps a child process of bitmaptools and allows for one command."""
   CROP_PIXELS = 0
   HISTOGRAM = 1
   BOUNDING_BOX = 2
 
   def __init__(self, dimensions, pixels):
-    suffix = '.exe' if sys.platform == 'win32' else ''
-    binary = util.FindSupportBinary('bitmaptools' + suffix)
+    binary = support_binaries.FindPath(
+        'bitmaptools', factory.GetPlatformBackendForCurrentOS().GetOSName())
     assert binary, 'You must build bitmaptools first!'
 
     self._popen = subprocess.Popen([binary],
                                    stdin=subprocess.PIPE,
                                    stdout=subprocess.PIPE,
                                    stderr=subprocess.PIPE)
 
     # dimensions are: bpp, width, height, boxleft, boxtop, boxwidth, boxheight
     packed_dims = struct.pack('iiiiiii', *dimensions)
     self._popen.stdin.write(packed_dims)
@@ skipping 204 matching lines @@
   def ColorHistogram(self, ignore_color=None, tolerance=0):
     """Computes a histogram of the pixel colors in this Bitmap.
     Args:
       ignore_color: An RgbaColor to exclude from the bucket counts.
       tolerance: A tolerance for the ignore_color.
 
     Returns:
       A ColorHistogram namedtuple with 256 integers in each field: r, g, and b.
     """
     return self._PrepareTools().Histogram(ignore_color, tolerance)