Roll Android SDK in android_tools repo to api version 16.

build/android/envsetup.sh

 #!/bin/bash
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Sets up environment for building Chromium on Android.  It can either be
 # compiled with the Android tree or using the Android SDK/NDK. To build with
 # NDK/SDK: ". build/android/envsetup.sh --sdk".  Environment variable
 # ANDROID_SDK_BUILD=1 will then be defined and used in the rest of the setup to
@@ skipping 37 matching lines @@
 if [ "${CURRENT_DIR/"${CHROME_SRC}"/}" == "${CURRENT_DIR}" ]; then
   # If current directory is not in $CHROME_SRC, it might be set for other
   # source tree. If $CHROME_SRC was set correctly and we are in the correct
   # directory, "${CURRENT_DIR/"${CHROME_SRC}"/}" will be "".
   # Otherwise, it will equal to "${CURRENT_DIR}"
   echo "Warning: Current directory is out of CHROME_SRC, it may not be \
 the one you want."
   echo "${CHROME_SRC}"
 fi
 
+# Android sdk platform version to use
+export ANDROID_SDK_VERSION=16
+
 # Source functions script.  The file is in the same directory as this script.
 . "$(dirname $BASH_SOURCE)"/envsetup_functions.sh
 
 if [ "${ANDROID_SDK_BUILD}" -eq 1 ]; then
   sdk_build_init
 # Sets up environment for building Chromium for Android with source. Expects
 # android environment setup and lunch.
 elif [ -z "$ANDROID_BUILD_TOP" -o -z "$ANDROID_TOOLCHAIN" -o \
   -z "$ANDROID_PRODUCT_OUT" ]; then
   echo "Android build environment variables must be set."
@@ skipping 35 matching lines @@
   if [[ $GYP_DEFINES =~ "clang=1" ]]; then
     echo -n "NOTE: You have \`clang=1' in \$GYP_DEFINES; "
     echo "did you mean to run \`android_clang_gyp'?"
   fi
 
   "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
 }
 
 # FLOCK needs to be null on system that has no flock
 which flock > /dev/null || export FLOCK=