Refactor and rename install-build-deps-android-sdk

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. Only Android NDK,
 # Revision 6b on Linux or Mac is offically supported.
 #
 # To run this script, the system environment ANDROID_NDK_ROOT must be set
 # to Android NDK's root path.
 #
 # TODO(michaelbai): Develop a standard for NDK/SDK integration.
 #
 # If current path isn't the Chrome's src directory, CHROME_SRC must be set
 # to the Chrome's src directory.
 
-if [ ! -d "${ANDROID_NDK_ROOT}" ]; then
-  echo "ANDROID_NDK_ROOT must be set to the path of Android NDK, Revision 6b." \
-    >& 2
-  echo "which could be installed by" >& 2
-  echo "<chromium_tree>/src/build/install-build-deps-android-sdk.sh" >& 2
+if [[ -z $ANDROID_SDK_ROOT ]]; then
+  export ANDROID_SDK_ROOT="/usr/local/google/android-sdk-linux"
+  echo "ANDROID_SDK_ROOT null, setting to: $ANDROID_SDK_ROOT" >&2
+fi
+
+if [[ -z $ANDROID_NDK_ROOT ]]; then
+  export ANDROID_NDK_ROOT="/usr/local/google/android-ndk-r7"
+  echo "ANDROID_NDK_ROOT null, setting to: $ANDROID_NDK_ROOT" >&2
+fi
+
+if [[ ! -d "$ANDROID_NDK_ROOT" || ! -d "$ANDROID_SDK_ROOT" ]]; then
+  echo "SDK / NDK paths not set or not installed" >&2
+  echo "To install: <chromium src root>/build/install-android-sdk-ndk.sh"
   return 1
 fi
 
-if [ ! -d "${ANDROID_SDK_ROOT}" ]; then
-  echo "ANDROID_SDK_ROOT must be set to the path of Android SDK, Android 3.2." \
-    >& 2
-  echo "which could be installed by" >& 2
-  echo "<chromium_tree>/src/build/install-build-deps-android-sdk.sh" >& 2
-  return 1
-fi
-
 host_os=$(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')
 
 case "${host_os}" in
   "linux")
     toolchain_dir="linux-x86"
     ;;
   "mac")
     toolchain_dir="darwin-x86"
     ;;
   *)
@@ skipping 110 matching lines @@
 export GYP_DEFINES="${DEFINES}"
 
 # Use the "android" flavor of the Makefile generator for both Linux and OS X.
 export GYP_GENERATORS="make-android"
 
 # Use our All target as the default
 export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} default_target=All"
 
 # We want to use our version of "all" targets.
 export CHROMIUM_GYP_FILE="${CHROME_SRC}/build/all_android.gyp"