[bindings] partial interfaces should not violate componentization

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 90 matching lines @@
       args += [ "--suffix", invoker.suffix ]
     }
   }
 }
 
 # 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.
 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"
 
     inputs =
       idl_lexer_parser_files +  # to be explicit (covered by parsetab)
       idl_compiler_files
@@ skipping 12 matching lines @@
     # 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 = [
-      "$output_dir/V8{{source_name_part}}.cpp",
-      "$output_dir/V8{{source_name_part}}.h",
+      "$output_dir/V8{{source_name_part}}${output_name_suffix}.cpp",
+      "$output_dir/V8{{source_name_part}}${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),
       "--interfaces-info",
       rebase_path("$bindings_modules_output_dir/InterfacesInfoModules.pickle",
                   root_build_dir),
       "--write-file-only-if-changed=1",  # Always true for Ninja.
+      "--target-component",
+      invoker.target_component,
       "{{source}}",
     ]
 
     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",
@@ skipping 154 matching lines @@
       output_header_files += [
         "$output_dir/${interface}${component}Constructors.h"
       ]
     }
 
     outputs = output_idl_files + output_header_files
     deps = invoker.deps
   }
 }