Initial patch for the web modules layered platform proposal.

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/bindings/core/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/idl.gni")
 import("//third_party/WebKit/Source/bindings/modules/modules.gni")
 
 bindings_scripts_dir = get_path_info(".", "abspath")
 bindings_scripts_output_dir = "$root_gen_dir/blink/bindings/scripts"
@@ skipping 100 matching lines @@
   }
 }
 
 # Runs the idl_compiler script over a list of sources.
 #
 # Parameters:
 #   sources = list of IDL files to compile
 #   output_dir = string containing the directory to put the output files.
 #   output_name_suffix = a suffix after the basename of the output file names.
 #   target_component = component to generate code for.
+#   is_web_modules = whether to generate C++ bindings for webmodules
+#       or JS bindings for the web.
 template("idl_compiler") {
   output_dir = invoker.output_dir
   output_name_suffix = invoker.output_name_suffix
 
   action_foreach(target_name) {
     # TODO(brettw) GYP adds a "-S before the script name to skip "import site" to
     # speed up startup. Figure out if we need this and do something similar (not
     # really expressible in GN now).
     script = "//third_party/WebKit/Source/bindings/scripts/idl_compiler.py"
 
@@ skipping 14 matching lines @@
     # Further, if any dependency (partial interface or implemented
     # interface) changes, rebuild everything, since every IDL potentially
     # depends on them, because we're not computing dependencies
     # file-by-file.
     # FIXME: This is too conservative, and causes excess rebuilds:
     # compute this file-by-file.  http://crbug.com/341748
     # This should theoretically just be the IDL files passed in.
     inputs += all_dependency_idl_files
 
     sources = invoker.sources
-    outputs = [
-      "$output_dir/V8{{source_name_part}}${output_name_suffix}.cpp",
-      "$output_dir/V8{{source_name_part}}${output_name_suffix}.h",
-    ]
+
+    if (invoker.is_web_modules) {
+      outputs = [
+        "$output_dir/webmodules/WebModule{{source_name_part}}${output_name_suffix}.cpp",
+        "$output_dir/webmodules/WebModule{{source_name_part}}${output_name_suffix}.h",
+      ]
+    } else {
+      outputs = [
+        "$output_dir/v8/V8{{source_name_part}}${output_name_suffix}.cpp",
+        "$output_dir/v8/V8{{source_name_part}}${output_name_suffix}.h",
+      ]
+    }
 
     args = [
       "--cache-dir",
       rebase_path(bindings_scripts_output_dir, root_build_dir),
       "--output-dir",
       rebase_path(output_dir, root_build_dir),
       "--info-dir",
       rebase_path("$bindings_output_dir", root_build_dir),
       "--write-file-only-if-changed=1",  # Always true for Ninja.
       "--target-component",
       invoker.target_component,
-      "{{source}}",
     ]
 
+    if (invoker.is_web_modules) {
+      args += [ "--web-modules" ]
+    }
+    args += [ "{{source}}" ]
+
     public_deps = [
       "//third_party/WebKit/Source/bindings/core:core_global_constructors_idls",
       # 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/modules:modules_core_global_constructors_idls",
       "//third_party/WebKit/Source/bindings/modules:modules_global_constructors_idls",
 
       "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
       "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
@@ skipping 170 matching lines @@
       output_header_files += [
         "$output_dir/${interface}${component}Constructors.h"
       ]
     }
 
     outputs = output_idl_files + output_header_files
     deps = invoker.deps
   }
 }