Remove dependency of gsutil to download ndk

platform_tools/android/bin/android_setup.sh

 function exportVar {
   NAME=$1
   VALUE=$2
   echo export $NAME=\"$VALUE\"
   export $NAME="$VALUE"
 }
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 # A valid Android SDK installation is required to build the sample app.
@@ skipping 47 matching lines @@
     echo "Using Mac toolchain."
     TOOLCHAIN_TYPE=ndk-r$NDK_REV-$ANDROID_ARCH-mac_v$API_LEVEL
 else
     echo "Could not automatically determine toolchain!  Defaulting to Linux."
     TOOLCHAIN_TYPE=ndk-r$NDK_REV-$ANDROID_ARCH-linux_v$API_LEVEL
 fi
 exportVar ANDROID_TOOLCHAIN ${TOOLCHAIN_DIR}/${TOOLCHAIN_TYPE}/bin
 
 # if the toolchain doesn't exist on your machine then we need to fetch it
 if [ ! -d "$ANDROID_TOOLCHAIN" ]; then
-  # gsutil must be installed on your system and in your PATH
-  gsutil version &> /dev/null
-  if [[ "$?" != "0" ]]; then
-    echo "ERROR: Unable to find gsutil. Please install it before proceeding."
-    exit 1
-  fi
   # create the toolchain directory if needed
   if [ ! -d "$TOOLCHAIN_DIR" ]; then
     mkdir $TOOLCHAIN_DIR
   fi
   # enter the toolchain directory then download, unpack, and remove the tarball 
   pushd $TOOLCHAIN_DIR
   TARBALL=ndk-r$NDK_REV-v$API_LEVEL.tgz
-  gsutil cp gs://chromium-skia-gm/android-toolchains/$TARBALL $TARBALL
+  
+  echo "Downloading $TARBALL ..."
+  ${SCRIPT_DIR}/download_toolchains.py http://chromium-skia-gm.commondatastorage.googleapis.com/android-toolchains/$TARBALL $TOOLCHAIN_DIR/$TARBALL
+  if [[ "$?" != "0" ]]; then
+    echo "ERROR: Unable to download toolchain $TARBALL."
+    exit 1
+  fi
+
   echo "Untarring $TOOLCHAIN_TYPE from $TARBALL."
   tar -xzf $TARBALL $TOOLCHAIN_TYPE
   echo "Removing $TARBALL"
   rm $TARBALL
   popd
 fi
 
 if [ ! -d "$ANDROID_TOOLCHAIN" ]; then
   echo "ERROR: unable to download/setup the required toolchain (${TOOLCHAIN_TYPE})"
   return 1;
@@ skipping 99 matching lines @@
 # Use the "android" flavor of the Makefile generator for both Linux and OS X.
 exportVar GYP_GENERATORS "make-android"
 
 # Helper function so that when we run "make" to build for clank it exports
 # the toolchain variables to make.
 #make_android() {
 #  CC="$CROSS_CC" CXX="$CROSS_CXX" LINK="$CROSS_LINK" \
 #  AR="$CROSS_AR" RANLIB="$CROSS_RANLIB" \
 #    command make $*
 #}