Beginning work on GN build

build/linux/BUILD.gn

Index: build/linux/BUILD.gn
diff --git a/build/linux/BUILD.gn b/build/linux/BUILD.gn
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index 0000000000000000000000000000000000000000..c81172e427fbf77f68ca33f400b0d359e8942646
--- /dev/null
+++ b/build/linux/BUILD.gn
@@ -0,0 +1,74 @@
+# Copyright (c) 2015 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.
+
+import("//build/config/features.gni")
+import("//build/config/linux/pkg_config.gni")
+
+# If brlapi isn't needed, don't require it to be installed.
+if (use_brlapi) {
+  deps = [
+    "//build/linux/libbrlapi",
+  ]
+}
+if (use_gio) {
+  pkg_config("gio_config") {
+    packages = [ "gio-2.0" ]
+
+    # glib >=2.40 deprecate g_settings_list_schemas in favor of
+    # g_settings_schema_source_list_schemas. This function is not available on
+    # earlier versions that we still need to support (specifically, 2.32), so
+    # disable the warning with the GLIB_DISABLE_DEPRECATION_WARNINGS define.
+    # TODO(mgiuca): Remove this suppression when we drop support for Ubuntu
+    # 13.10 (saucy) and earlier. Update the code to use
+    # g_settings_schema_source_list_schemas instead.
+    defines = [
+      "USE_GIO",
+      "GLIB_DISABLE_DEPRECATION_WARNINGS",
+    ]
+
+    # TODO(brettw) Theoretically I think ignore_libs should be set so that we
+    # don't link directly to GIO and use the loader generated below. But the
+    # gio target in GYP doesn't make any sense to me and appears to link
+    # directly to GIO in addition to making a loader. This this uncommented,
+    # the link in component build fails, so I think this is closer to the
+    # GYP build.
+    #ignore_libs = true  # Loader generated below.
+  }
+
+  deps = [
+    "//build/linux/libgio",
+  ]
+}
+
+# Looking for libspeechd? Use //third_party/speech-dispatcher
+
+group("fontconfig") {
+  if (is_chromecast) {
+    # Chromecast platform does not provide fontconfig
+    public_deps = [
+      "//third_party/fontconfig",
+    ]
+  } else {
+    public_configs = [ "//build/config/linux:fontconfig" ]
+  }
+}
+
+if (!is_chromecast) {
+  pkg_config("freetype2_config") {
+    visibility = [ ":freetype2" ]
+    packages = [ "freetype2" ]
+  }
+}
+
+group("freetype2") {
+  if (is_chromecast) {
+    # Chromecast platform doesn't provide freetype, so use Chromium's.
+    # The version in freetype-android is unmodified from freetype2 upstream.
+    public_deps = [
+      "//third_party/freetype-android:freetype",
+    ]
+  } else {
+    public_configs = [ ":freetype2_config" ]
+  }
+}