Work on blink GN bindings

Source/modules/modules.gni

Index: Source/modules/modules.gni
diff --git a/Source/modules/modules.gni b/Source/modules/modules.gni
index 87f14719d1097a24e5579e0945933d194c7a9747..1a3c784c1272b258216ec16042a09c0cb50f5a54 100644
--- a/Source/modules/modules.gni
+++ b/Source/modules/modules.gni
@@ -17,17 +17,18 @@ _tmp_modules_idl_files = _gypi.modules_idl_files
 _tmp_modules_idl_files -= [
   "<@(extra_blink_module_idl_files)",
 ]
-modules_idl_files = rebase_path(_tmp_modules_idl_files, "//")
+modules_idl_files = get_path_info(_tmp_modules_idl_files, "abspath")
 
 # 'partial interface' or target (right side of) 'implements'
 modules_dependency_idl_files =
-  rebase_path(_gypi.modules_dependency_idl_files, "//")
+  get_path_info(_gypi.modules_dependency_idl_files, "abspath")
 
-# Relative to the modules directory.
-modules_event_idl_files = _gypi.modules_event_idl_files
+modules_event_idl_files =
+  get_path_info(_gypi.modules_event_idl_files, "abspath")
 
 # interfaces that inherit from Event
-generated_modules_files = rebase_path(_gypi.generated_modules_files, "//")
+generated_modules_files =
+  get_path_info(_gypi.generated_modules_files, "abspath")
 
 # Remove GYP variables from the list (need to do this before rebasing).
 _tmp_modules_files = _gypi.modules_files
@@ -35,13 +36,14 @@ _tmp_modules_files -= [
   "<@(extra_blink_module_files)",
   "<@(generated_modules_files)",
 ]
-modules_files = rebase_path(_tmp_modules_files, "//")
+modules_files = get_path_info(_tmp_modules_files, "abspath")
 modules_files += generated_modules_files  # Account for GYP var expansion.
 
 # 'partial interface' or target (right side of) 'implements'
 modules_testing_dependency_idl_files =
-  rebase_path(_gypi.modules_testing_dependency_idl_files, "//")
+  get_path_info(_gypi.modules_testing_dependency_idl_files, "abspath")
 
-# Relative to the modules dir.
-modules_testing_files = _gypi.modules_testing_files
-modules_unittest_files = _gypi.modules_unittest_files
+modules_testing_files = get_path_info(_gypi.modules_testing_files, "abspath")
+modules_unittest_files = get_path_info(_gypi.modules_unittest_files, "abspath")
+
+blink_modules_output_dir = "$root_gen_dir/blink/modules"