Initial checkin of chromecast content embedder (cast_shell) and related build scripts.

chromecast/build/build_env_clang_chromecast.sh

+# Copyright (c) 2014 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.
+
+function setup_common_env_clang_chromecast() {
+  setup_chromium_env_common clang_chromecast $@
+
+  unset CC
+  unset CXX
+
+  unset CC_host
+  unset CXX_host
+
+# undo setup_build_toolchain()
+  unset AR_target
+  unset CC_target
+  unset CXX_target
+  unset LD_target
+  unset OBJCOPY_target
+  unset STRIP_target
+
+  # leaving the target arch empty for the system to decide which one to use
+  # (32 bit or 64 bit).
+
+  setup_chromium_env_common_chromecast
+
+  # use_system_libjpeg=1: use native libjpeg for x86 builds
+  local defines="
+    clang=1
+    use_system_libjpeg=1
+  "
+  export GYP_DEFINES="${GYP_DEFINES} ${defines}"
+
+  ${CHROME_SRCROOT}/tools/clang/scripts/update.sh
+  if [ ! -d ${CHROME_SRCROOT}/third_party/llvm-build ]; then
+    echo "Unable to find clang"
+    exit -1
+  fi
+}
+
+function setup_chromium_env_clang_chromecast() {
+  setup_common_env_clang_chromecast $@
+
+  local defines="
+    chromecast_branding=Chromium
+  "
+
+  export GYP_DEFINES="${GYP_DEFINES} ${defines}"
+}
+
+function setup_chrome_env_clang_chromecast() {
+  setup_common_env_clang_chromecast $@
+
+  local defines="
+    chromecast_branding=Chrome
+  "
+
+  export GYP_DEFINES="${GYP_DEFINES} ${defines}"
+}