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

chromecast/build/build_env_common_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.
+
+# Common function for all chromecast targets.
+function setup_chromium_env_common_chromecast() {
+  # In alpha order:
+  # - chromecast_build=1: This is a Chromecast build.
+  # - disable_nacl=1: We do not support Native Client.
+  # - enable_pepper_cdms=0: Disable pepper plugin based CDMs.
+  # - ffmpeg_branding=Chrome: This picks up additional codecs
+  # - icu_use_data_file_flag=0: We don't use separate ICU data file
+  # - proprietary_codecs=1
+  # - safe_browsing=0: safe browsing takes a very large amount of memory: a few
+  #   MB persistent, and tens of MB (according to chromium-dev) when the DB is
+  #   updated.
+  # - screen_capture_supported=0
+  # - toolkit_uses_gtk=0: we disable all GTK.
+  # - toolkit_views=0: related to disabling GTK (alternative to GTK).
+  # - use_aura=0
+  # - use_cairo=0: We use fontconfig + freetype
+  # - use_cups=0: we do not support printing on this platform.
+  # - use_dbus=0
+  # - use_glib=0
+  # - use_harfbuzz_ng=1
+  # - use_kerberos=0
+  # - use_pango=0
+  # - use_system_fontconfig=0: use fontconfig from the Chromium tree.
+  # - use_udev=0
+  # - use_webcrypto_ipc=0
+  # - use_x11=0: we do not support X11 on this platform.
+  local defines="
+disable_nacl=1
+enable_pepper_cdms=0
+chromecast_build=1
+ffmpeg_branding=Chrome
+icu_use_data_file_flag=0
+proprietary_codecs=1
+safe_browsing=0
+screen_capture_supported=0
+toolkit_uses_gtk=0
+toolkit_views=1
+use_aura=0
+use_cairo=0
+use_cups=0
+use_dbus=0
+use_glib=0
+use_harfbuzz_ng=1
+use_kerberos=0
+use_pango=0
+use_system_fontconfig=0
+use_udev=0
+use_webcrypto_ipc=0
+use_x11=0
+"
+  export GYP_DEFINES="${GYP_DEFINES} ${defines}"
+}