enter_chroot: bind mount depot_tools if present outside chroot.

src/scripts/enter_chroot.sh

Index: src/scripts/enter_chroot.sh
diff --git a/src/scripts/enter_chroot.sh b/src/scripts/enter_chroot.sh
index ab5418e6ccb749551a9b61a19a183553d0bd2195..89f29328b1d8e6f85e816b66a0ef00885ca4c726 100755
--- a/src/scripts/enter_chroot.sh
+++ b/src/scripts/enter_chroot.sh
@@ -63,6 +63,7 @@ set -e
 
 INNER_CHROME_ROOT="/home/$USER/chrome_root"  # inside chroot
 CHROME_ROOT_CONFIG="/var/cache/chrome_root"  # inside chroot
+INNER_DEPOT_TOOLS_ROOT="/home/$USER/depot_tools"  # inside chroot
 
 sudo chmod 0777 "$FLAGS_chroot/var/lock"
 
@@ -113,6 +114,17 @@ function setup_env {
         sudo mount --bind "$CHROME_ROOT" "$MOUNTED_PATH"
       fi
     fi
+
+    MOUNTED_PATH="$(readlink -f "${FLAGS_chroot}${INNER_DEPOT_TOOLS_ROOT}")"
+    if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
+    then
+      if [ $(which gclient 2>/dev/null) ]; then
+        echo "Mounting depot_tools"
+        DEPOT_TOOLS=$(dirname $(which gclient) )
+        mkdir -p "$MOUNTED_PATH"
+        sudo mount --bind "$DEPOT_TOOLS" "$MOUNTED_PATH"
+      fi
+    fi
   ) 200>>"$LOCKFILE"
 }