Work on blink GN bindings

Source/bindings/bindings.gni

Index: Source/bindings/bindings.gni
diff --git a/Source/bindings/bindings.gni b/Source/bindings/bindings.gni
index 3fd8f42bfe5a5acab168dcd455c7dd12d1bc182c..73b987df4f3218c539d354d6ac5b61bac8f07d33 100644
--- a/Source/bindings/bindings.gni
+++ b/Source/bindings/bindings.gni
@@ -2,73 +2,50 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# TODO(brettw) enable this to read the bindings sources (needs some work on the
-# .gypi reading script).
-#
-_gypi = exec_script(
+# All paths in this file should be absolute so it can be imported into
+# different contexts.
+
+# v8/custom/custom.gypi --------------------------------------------------------
+
+# These paths are relative to v8/custom.
+_v8_custom_gypi = exec_script(
     "//build/gypi_to_gn.py",
-    [ rebase_path("v8/v8.gypi"),
-      "--replace=<(SHARED_INTERMEDIATE_DIR)=$root_gen_dir" ],
+    [ rebase_path("v8/custom/custom.gypi") ],
+    "scope",
+    [ "v8/custom/custom.gypi" ])
+
+bindings_v8_custom_dir = get_path_info("v8/custom", "abspath")
+bindings_v8_custom_files = get_path_info(
+    rebase_path(_v8_custom_gypi.bindings_v8_custom_files, ".",
+                bindings_v8_custom_dir),
+    "abspath")
+
+# v8/v8.gypi -------------------------------------------------------------------
+
+# These paths are relative to v8.
+_v8_gypi = exec_script(
+    "//build/gypi_to_gn.py",
+    [ rebase_path("v8/v8.gypi") ],
     "scope",
     [ "v8/v8.gypi" ])
 
-bindings_v8_dir = "//third_party/WebKit/Source/bindings/v8"
-blink_output_dir = "$root_gen_dir/blink"
-bindings_output_dir = "$blink_output_dir/bindings"
+bindings_v8_dir = get_path_info("v8", "abspath")
+
+# v8.gypi references includes a reference to the custom_files list. Manually
+# expand that.
+_rel_bindings_v8_files = _v8_gypi.bindings_v8_files
+_rel_bindings_v8_files -= [ "<@(bindings_v8_custom_files)" ]
+bindings_v8_files = get_path_info(
+    rebase_path(_rel_bindings_v8_files, ".", "v8"),
+    "abspath")
+bindings_v8_files += bindings_v8_custom_files
 
-# Note: these are relative to the bindings/v8 directory.
-bindings_v8_files = _gypi.bindings_v8_files
-bindings_v8_unittest_files = _gypi.bindings_v8_unittest_files
+# bindings.gypi ----------------------------------------------------------------
+
+bindings_dir = get_path_info(".", "abspath")
+blink_output_dir = "$root_gen_dir/blink"
+bindings_output_dir = "$root_gen_dir/blink/bindings"
 
-if (is_win && is_official_build) {
-  # On Windows Official release builds, we try to preserve symbol space.
-  bindings_core_generated_aggregate_files = [
-    "$bindings_output_dir/V8GeneratedCoreBindings.cpp",
-  ]
-  bindings_modules_generated_aggregate_files = [
-    "$bindings_output_dir/V8GeneratedModulesBindings.cpp",
-  ]
-} else {
-  bindings_core_generated_aggregate_files = [
-    "$bindings_output_dir/V8GeneratedCoreBindings01.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings02.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings03.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings04.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings05.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings06.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings07.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings08.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings09.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings10.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings11.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings12.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings13.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings14.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings15.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings16.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings17.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings18.cpp",
-    "$bindings_output_dir/V8GeneratedCoreBindings19.cpp",
-  ]
-  bindings_modules_generated_aggregate_files = [
-    "$bindings_output_dir/V8GeneratedModulesBindings01.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings02.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings03.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings04.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings05.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings06.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings07.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings08.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings09.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings10.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings11.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings12.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings13.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings14.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings15.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings16.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings17.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings18.cpp",
-    "$bindings_output_dir/V8GeneratedModulesBindings19.cpp",
-  ]
-}
+bindings_unittest_files = get_path_info(
+    rebase_path(_v8_gypi.bindings_v8_unittest_files, ".", bindings_v8_dir),
+    "abspath")