[devil] Add an iteration timeout option to cmd_helper.IterCmdStdoutLines.

devil/docs/adb_wrapper.md

 # [devil.android.sdk.adb_wrapper](https://github.com/catapult-project/catapult/blob/master/devil/devil/android/sdk/adb_wrapper.py)
 
 *This page was autogenerated by `devil/utils/markdown.py --module-link https://github.com/catapult-project/catapult/blob/master/devil/devil/android/sdk/adb_wrapper.py`*
 
+## DeviceStat
+
+DeviceStat(st\_mode, st\_size, st\_time)
+### DeviceStat.\_\_repr\_\_
+
+Return a nicely formatted representation string
+### DeviceStat.\_\_getnewargs\_\_
+
+Return self as a plain tuple.  Used by copy and pickle.
+### DeviceStat.\_\_getstate\_\_
+
+Exclude the OrderedDict from pickling
 ## AdbWrapper
 
 A wrapper around a local Android Debug Bridge executable.
-### AdbWrapper.\_\_init\_\_
-
-Initializes the AdbWrapper.
-```
-    Args:
-      device_serial: The device serial number as a string.
-```
-
-
-### AdbWrapper.\_\_eq\_\_
-
-Consider instances equal if they refer to the same device.
-```
-    Args:
-      other: The instance to compare equality with.
-
-    Returns:
-      True if the instances are considered equal, false otherwise.
-```
-
-
-### AdbWrapper.\_\_str\_\_
-
-The string representation of an instance.
-```
-    Returns:
-      The device serial number as a string.
-```
-
-
-### AdbWrapper.\_\_repr\_\_
-
 ### AdbWrapper.GetDeviceSerial
 
 Gets the device serial number associated with this object.
 ```
     Returns:
       Device serial number as a string.
 ```
 
 
 ### AdbWrapper.Push
@@ skipping 80 matching lines @@
     Args:
       clear: If true, clear the logcat.
       dump: If true, dump the current logcat contents.
       filter_specs: If set, a list of specs to filter the logcat.
       logcat_format: If set, the format in which the logcat should be output.
         Options include "brief", "process", "tag", "thread", "raw", "time",
         "threadtime", and "long"
       ring_buffer: If set, a list of alternate ring buffers to request.
         Options include "main", "system", "radio", "events", "crash" or "all".
         The default is equivalent to ["main", "system", "crash"].
+      iter_timeout: If set and neither clear nor dump is set, the number of
+        seconds to wait between iterations. If no line is found before the
+        given number of seconds elapses, the iterable will yield None.
       timeout: (optional) If set, timeout per try in seconds. If clear or dump
         is set, defaults to DEFAULT_TIMEOUT.
       retries: (optional) If clear or dump is set, the number of retries to
         attempt. Otherwise, does nothing.
 
     Yields:
       logcat output line by line.
 ```
 
 
@@ skipping 202 matching lines @@
       The output of the emulator console command.
 ```
 
 
 ### AdbWrapper.DisableVerity
 
 Disable Marshmallow's Verity security feature
 ### AdbWrapper.EnableVerity
 
 Enable Marshmallow's Verity security feature
-## DeviceStat
+### AdbWrapper.\_\_init\_\_
 
-DeviceStat(st\_mode, st\_size, st\_time)
-### DeviceStat.\_\_repr\_\_
+Initializes the AdbWrapper.
+```
+    Args:
+      device_serial: The device serial number as a string.
+```
 
-Return a nicely formatted representation string
-### DeviceStat.\_\_getnewargs\_\_
 
-Return self as a plain tuple.  Used by copy and pickle.
-### DeviceStat.\_\_getstate\_\_
+### AdbWrapper.\_\_eq\_\_
 
-Exclude the OrderedDict from pickling
+Consider instances equal if they refer to the same device.
+```
+    Args:
+      other: The instance to compare equality with.
+
+    Returns:
+      True if the instances are considered equal, false otherwise.
+```
+
+
+### AdbWrapper.\_\_str\_\_
+
+The string representation of an instance.
+```
+    Returns:
+      The device serial number as a string.
+```
+
+
+### AdbWrapper.\_\_repr\_\_
+
 ### VerifyLocalFileExists
 
 Verifies a local file exists.
 ```
   Args:
     path: Path to the local file.
 
   Raises:
     IOError: If the file doesn't exist.
 ```