Revert of [Android] Remove adb_commands from telemetry.

tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py

Index: tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py
diff --git a/tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py b/tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py
index fc78127cd81df6bd351c70c2c78d5c40c9ed8b1b..87194063a4deeaa74ddc0d7287db8959958ea3e4 100644
--- a/tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py
+++ b/tools/telemetry/telemetry/core/platform/profiler/java_heap_profiler.py
@@ -48,9 +48,9 @@
   def CollectProfile(self):
     self._timer.cancel()
     self._DumpJavaHeap(True)
-    self._browser_backend.device.PullFile(
+    self._browser_backend.adb.device().PullFile(
         self._DEFAULT_DEVICE_DIR, self._output_path)
-    self._browser_backend.device.RunShellCommand(
+    self._browser_backend.adb.RunShellCommand(
         'rm ' + os.path.join(self._DEFAULT_DEVICE_DIR, '*'))
     output_files = []
     for f in os.listdir(self._output_path):
@@ -67,25 +67,25 @@
     self._DumpJavaHeap(False)
 
   def _DumpJavaHeap(self, wait_for_completion):
-    if not self._browser_backend.device.FileExists(
+    if not self._browser_backend.adb.device().FileExists(
         self._DEFAULT_DEVICE_DIR):
-      self._browser_backend.device.RunShellCommand(
+      self._browser_backend.adb.RunShellCommand(
           'mkdir -p ' + self._DEFAULT_DEVICE_DIR)
-      self._browser_backend.device.RunShellCommand(
+      self._browser_backend.adb.RunShellCommand(
           'chmod 777 ' + self._DEFAULT_DEVICE_DIR)
 
     device_dump_file = None
     for pid in self._GetProcessOutputFileMap().iterkeys():
       device_dump_file = '%s/%s.%s.aprof' % (self._DEFAULT_DEVICE_DIR, pid,
                                              self._run_count)
-      self._browser_backend.device.RunShellCommand(
-          'am dumpheap %s %s' % (pid, device_dump_file))
+      self._browser_backend.adb.RunShellCommand('am dumpheap %s %s' %
+                                                (pid, device_dump_file))
     if device_dump_file and wait_for_completion:
       util.WaitFor(lambda: self._FileSize(device_dump_file) > 0, timeout=2)
     self._run_count += 1
 
   def _FileSize(self, file_name):
     try:
-      return self._browser_backend.device.Stat(file_name).st_size
+      return self._browser_backend.adb.device().Stat(file_name).st_size
     except device_errors.CommandFailedError:
       return 0