IDL: Add build target for IDL dictionary impl generation in core

Source/bindings/scripts/scripts.gni

Index: Source/bindings/scripts/scripts.gni
diff --git a/Source/bindings/scripts/scripts.gni b/Source/bindings/scripts/scripts.gni
index 863e3c8ade20ec782c7056ca2c3fc009590a0e4d..c103c29d25e17234c46ef6731f5fa3b19bbb35f2 100644
--- a/Source/bindings/scripts/scripts.gni
+++ b/Source/bindings/scripts/scripts.gni
@@ -174,6 +174,45 @@ template("idl_compiler") {
   }
 }
 
+# Runs the idl_compiler to generate IDL dictionary impl files.
+#
+# Parameters:
+#   sources = a list of IDL files to process
+#   outputs = a list of files to write to
+template("idl_dictionary") {
+  output_dir = "$root_gen_dir/blink/"
+
+  action(target_name) {
+    script = "//third_party/WebKit/Source/bindings/scripts/idl_compiler.py"
+    idl_files_list = "$target_gen_dir/${target_name}_file_list.tmp"
+    write_file(idl_files_list, rebase_path(invoker.sources, root_build_dir))
+
+    inputs = [ idl_files_list ] + invoker.sources
+    outputs = invoker.outputs
+
+    args = [
+      "--cache-dir",
+      rebase_path(bindings_scripts_output_dir, root_build_dir),
+      "--output-dir",
+      rebase_path(output_dir, root_build_dir),
+      "--interfaces-info",
+      rebase_path("$bindings_modules_output_dir/InterfacesInfoModules.pickle",
+                  root_build_dir),
+      "--write-file-only-if-changed=1",
+      "--generate-dictionary-impl",
+      rebase_path(idl_files_list, root_build_dir),
+    ]
+
+    deps = [
+      # FIXME: should be interfaces_info_core (w/o modules)
+      # http://crbug.com/358074
+      "//third_party/WebKit/Source/bindings/modules:interfaces_info",
+      "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
+      "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
+    ]
+  }
+}
+
 # Calls the aggregate_generated_bindings script.
 #
 # Parameters: