Telemetry: extends Platform abstraction.

tools/telemetry/telemetry/android_browser_finder.py

Index: tools/telemetry/telemetry/android_browser_finder.py
diff --git a/tools/telemetry/telemetry/android_browser_finder.py b/tools/telemetry/telemetry/android_browser_finder.py
index 26614351bd9680120a4a5cc1210331e1567ca261..b0a4b6b0215877c75867b612bd9991900ffdc3d8 100644
--- a/tools/telemetry/telemetry/android_browser_finder.py
+++ b/tools/telemetry/telemetry/android_browser_finder.py
@@ -7,6 +7,7 @@ import os
 import logging as real_logging
 import re
 import subprocess
+import sys
 
 from telemetry import adb_commands
 from telemetry import android_browser_backend
@@ -14,6 +15,14 @@ from telemetry import android_platform
 from telemetry import browser
 from telemetry import possible_browser
 
+sys.path.append(

[nduca, 2012/12/04 09:20:17]

please call through adb_commands by wrapping. That wrapping layer Its there so
we dont muck with imports all the time as well as so we can gracefully handle
lack of pylib during a bootstrap scenario.

+    os.path.abspath(
+        os.path.join(os.path.dirname(__file__),
+                     '../../../build/android/pylib')))
+import perf_tests_helper # pylint: disable=F0401
+import thermal_throttle # pylint: disable=F0401
+
+
 ALL_BROWSER_TYPES = ','.join([
     'android-content-shell',
     'android-chrome',
@@ -58,6 +67,26 @@ class PossibleAndroidBrowser(possible_browser.PossibleBrowser):
         self._args[1] + self._args[4])
     return browser.Browser(backend, platform)
 
+  def CreatePlatformHarness(self):
+    class AndroidPlatformHarness(object):
+      def __init__(self, adb):
+        self._perf_tests_setup = perf_tests_helper.PerfTestSetup(adb)
+        self._thermal_throttle = thermal_throttle.ThermalThrottle(adb)
+
+      def __enter__(self):
+        if self._thermal_throttle.IsThrottled():
+          real_logging.warn('Device is being thermally throttled.')
+        self._perf_tests_setup.SetUp()
+        return self
+
+      def __exit__(self, *args):
+        if self._thermal_throttle.HasBeenThrottled():
+          real_logging.warn('Device was thermally throttled during tests.')
+        self._perf_tests_setup.TearDown()
+
+    return AndroidPlatformHarness(self._args[0].Adb())
+
+
 def FindAllAvailableBrowsers(options, logging=real_logging):
   """Finds all the desktop browsers available on this machine."""
   if not adb_commands.IsAndroidSupported():