Revert of [Bindings] Remove aggregation of generated binding code

third_party/WebKit/Source/bindings/scripts/scripts.gni

 # Copyright 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.
 
 import("//third_party/WebKit/Source/core/core_idl_files.gni")
 import("//third_party/WebKit/Source/modules/modules_idl_files.gni")
 
 bindings_scripts_dir = get_path_info(".", "abspath")
 bindings_scripts_output_dir = "$root_gen_dir/blink/bindings/scripts"
 
@@ skipping 254 matching lines @@
       # http://crbug.com/358074
       "//third_party/WebKit/Source/bindings/core:interfaces_info_individual_core",
       "//third_party/WebKit/Source/bindings/modules:interfaces_info",
       "//third_party/WebKit/Source/bindings/modules:interfaces_info_individual_modules",
       "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
       "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
     ]
   }
 }
 
+# Calls the aggregate_generated_bindings script.
+#
+# Parameters:
+#   sources = a list of source IDL files.
+#   component_dir = Name of directory for these files (one word, no slashes).
+#   outputs = a list of files to write to.
+template("aggregate_generated_bindings") {
+  action(target_name) {
+    script = "//third_party/WebKit/Source/bindings/scripts/aggregate_generated_bindings.py"
+
+    # Write lists of main IDL files to a file, so that the command lines don't
+    # exceed OS length limits.
+    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 = [
+      "--component-directory",
+      invoker.component_dir,
+      "--input-file",
+      rebase_path(idl_files_list, root_build_dir),
+    ]
+    if (invoker.is_partial) {
+      args += [ "--partial" ]
+    }
+    args += rebase_path(invoker.outputs, root_build_dir)
+  }
+}
+
 # Calls the compute_global_objects script.
 #
 # Parameters:
 #   sources = a list of source IDL files.
 #   sources_generated = a list of generated pickle sources.
 #   output_file = a pickle file to write to (need to specify directory)
 #
 template("compute_global_objects") {
   action(target_name) {
     script =
@@ skipping 72 matching lines @@
       args += [ rebase_path(output_idl_file, root_build_dir) ]
       output_idl_files += [ output_idl_file ]
       output_header_files +=
           [ "$output_dir/${interface}${component}Constructors.h" ]
     }
 
     outputs = output_idl_files + output_header_files
     deps = invoker.deps
   }
 }