Latest Release: ChromeDriver 2.20
Changes include:
Fixes to make ChromeDriver compatible with recent versions of adb
Unicode conversion fixes on Chrome OS
The /sessions endpoint now uses a key named "id" rather than "sessionId" (as required by the WebDriver Wire Protocol)
Access to <webview> tags is now possible through ChromeOptions.windowTypes
Changes to mobile emulation:
Device width, height and pixel ratio are now optional parameters
The list of mobile device names has been updated to match those in DevTools
The latest WebDriver atoms have been imported
The latest version is recommended, and bugs will not be fixed in previous versions.