[devil] Allow instantiation of AdbWrapper with USB bus identifer.

devil/devil/android/sdk/adb_wrapper.py

Index: devil/devil/android/sdk/adb_wrapper.py
diff --git a/devil/devil/android/sdk/adb_wrapper.py b/devil/devil/android/sdk/adb_wrapper.py
index e2ca0139b7ab4090c0241002530181587ed6884e..9890f11735375197f5c02a8ce17b7a38bf3a1d0e 100644
--- a/devil/devil/android/sdk/adb_wrapper.py
+++ b/devil/devil/android/sdk/adb_wrapper.py
@@ -120,10 +120,19 @@ class AdbWrapper(object):
     """Initializes the AdbWrapper.
 
     Args:
-      device_serial: The device serial number as a string.
+      device_serial: The device serial number or USB bus ID as a string.
+
+      WARNING: Some features may not be supported with USB ID.
+
     """
     if not device_serial:
       raise ValueError('A device serial must be specified')
+
+    # TODO: Improve support for instances created from a USB ID.
+    if "usb:" in device_serial:
+      logger.warning("Some features may not be supported when selecting "
+                     "devices by USB Id.")
+
     self._device_serial = str(device_serial)
 
   class PersistentShell(object):
@@ -824,16 +833,21 @@ class AdbWrapper(object):
       retries: (optional) Number of retries to attempt.
 
     Returns:
-      One of 'offline', 'bootloader', or 'device'.
+      One of 'offline', 'bootloader', 'unauthorized', 'no' [permissions],
+      or 'device'.
     """
     # TODO(jbudorick): Revert to using get-state once it doesn't cause a
     # a protocol fault.
     # return self._RunDeviceAdbCmd(['get-state'], timeout, retries).strip()
 
-    lines = self._RawDevices(timeout=timeout, retries=retries)
+    lines = self._RawDevices(timeout=timeout, retries=retries, long_list=True)
     for line in lines:
-      if len(line) >= 2 and line[0] == self._device_serial:
+      if not len(line) >= 3:
+        continue
+
+      if line[0] == self._device_serial or line[2] == self._device_serial:
         return line[1]
+
     return 'offline'
 
   def GetDevPath(self, timeout=DEFAULT_TIMEOUT, retries=DEFAULT_RETRIES):