Reorganize Blink IDL build, delete obsolete GYP files.

third_party/WebKit/Source/modules/modules.gni

Index: third_party/WebKit/Source/modules/modules.gni
diff --git a/third_party/WebKit/Source/modules/modules.gni b/third_party/WebKit/Source/modules/modules.gni
index a7ffca8f859f4565590b1402f109cf440fa6bf87..9a9f01a73a9e065c16b31c65521671edb41006b4 100644
--- a/third_party/WebKit/Source/modules/modules.gni
+++ b/third_party/WebKit/Source/modules/modules.gni
@@ -4,35 +4,16 @@
 
 import("//third_party/WebKit/Source/config.gni")
 
-blink_modules_output_dir = "$root_gen_dir/blink/modules"
-
 _gypi = exec_script(
         "//build/gypi_to_gn.py",
         [
           rebase_path("modules.gypi"),
           "--replace=<(SHARED_INTERMEDIATE_DIR)=$root_gen_dir",
-          "--replace=<(blink_modules_output_dir)=$blink_modules_output_dir",
+          "--replace=<(blink_modules_output_dir)=$root_gen_dir/blink/modules",
         ],
         "scope",
         [ "modules.gypi" ])
 
-_tmp_modules_idl_files = _gypi.modules_idl_files
-
-# modules_idl_files has a magic variable in it that is an embedder hook,
-# remove that since it's not a file (need to do this before rebasing).
-_tmp_modules_idl_files -= [ "<@(extra_blink_module_idl_files)" ]
-modules_idl_files = get_path_info(_tmp_modules_idl_files, "abspath")
-
-modules_dictionary_idl_files =
-    get_path_info(_gypi.modules_dictionary_idl_files, "abspath")
-
-# 'partial interface' or target (right side of) 'implements'
-modules_dependency_idl_files =
-    get_path_info(_gypi.modules_dependency_idl_files, "abspath")
-
-modules_event_idl_files =
-    get_path_info(_gypi.modules_event_idl_files, "abspath")
-
 # interfaces that inherit from Event
 generated_modules_files =
     get_path_info(_gypi.generated_modules_files, "abspath")
@@ -52,10 +33,6 @@ modules_files = get_path_info(_tmp_modules_files, "abspath")
 # Account for GYP var expansion.
 modules_files += generated_modules_files + generated_modules_dictionary_files
 
-# 'partial interface' or target (right side of) 'implements'
-modules_testing_dependency_idl_files =
-    get_path_info(_gypi.modules_testing_dependency_idl_files, "abspath")
-
 # Defines a part of blink modules. This is either a source set or a static
 # library with defaults for commonly-used values.
 #