Android: Check for Oracle Java when running build/android/envsetup.sh.

build/android/envsetup.sh

 # 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".  Environment variable
 # ANDROID_SDK_BUILD=1 will then be defined and used in the rest of the setup to
 # specifiy build type.
 
@@ skipping 86 matching lines @@
   echo "Please cd to the root of your Android tree and do: "
   echo "  . build/envsetup.sh"
   echo "  lunch"
   echo "Then try this again."
   echo "Or did you mean NDK/SDK build. Run envsetup.sh without any arguments."
   return 1
 elif [[ -n "$CHROME_ANDROID_BUILD_WEBVIEW" ]]; then
   webview_build_init
 fi
 
+java -version 2>&1 | grep -qs "Java HotSpot"
+if [ $? -ne 0 ]; then
+  echo "Please check and make sure you are using the Oracle Java SDK, and it"
+  echo "appears before other Java SDKs in your path."
+  echo "Refer to the \"Install prerequisites\" section here:"
+  echo "https://code.google.com/p/chromium/wiki/AndroidBuildInstructions"
+  return 1
+fi
+
 # Workaround for valgrind build
 if [[ -n "$CHROME_ANDROID_VALGRIND_BUILD" ]]; then
 # arm_thumb=0 is a workaround for https://bugs.kde.org/show_bug.cgi?id=270709
   DEFINES+=" arm_thumb=0 release_extra_cflags='-fno-inline\
  -fno-omit-frame-pointer -fno-builtin' release_valgrind_build=1\
  release_optimize=1"
 fi
 
 # Source a bunch of helper functions
 . ${CHROME_SRC}/build/android/adb_device_functions.sh
@@ skipping 12 matching lines @@
   # This is just a simple wrapper of gyp_chromium, please don't add anything
   # in this function.
   echo "GYP_GENERATORS set to '$GYP_GENERATORS'"
   (
     "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
   )
 }
 
 # FLOCK needs to be null on system that has no flock
 which flock > /dev/null || export FLOCK=