Update chrome driver

Change-Id: Ia3bb37abe7b48f29e729e7a9c6d93a0f931260d3
diff --git a/runner/chrome_linux_start.sh b/runner/chrome_linux_start.sh
index 5801fda..5f8d648 100755
--- a/runner/chrome_linux_start.sh
+++ b/runner/chrome_linux_start.sh
@@ -1,5 +1,5 @@
 java -jar selenium-server-standalone-2.46.0.jar -role node \
   -hub http://100.107.70.41:4444/grid/register \
   -forcedBrowserMode chrome -maxSession 1 \
-  -Dwebdriver.chrome.driver=chromedriver_linux_x64_2.16 \
+  -Dwebdriver.chrome.driver=chromedriver_linux_x64_2.21 \
   -browser browserName=chrome,maxInstances=1,platform=LINUX
diff --git a/runner/chromedriver_linux_x64_2.16 b/runner/chromedriver_linux_x64_2.16
deleted file mode 100755
index c3f8f0e..0000000
--- a/runner/chromedriver_linux_x64_2.16
+++ /dev/null
Binary files differ
diff --git a/runner/chromedriver_linux_x64_2.21 b/runner/chromedriver_linux_x64_2.21
new file mode 100755
index 0000000..ccb5872
--- /dev/null
+++ b/runner/chromedriver_linux_x64_2.21
Binary files differ