Work on blink GN bindings

Source/bindings/modules/generated.gyp

Index: Source/bindings/modules/generated.gyp
diff --git a/Source/bindings/modules/generated.gyp b/Source/bindings/modules/generated.gyp
index 10b042f6a3b69be5cca74119d6bcab247e5d914b..4584eab0937b9604b19760388601ac7626f675dd 100644
--- a/Source/bindings/modules/generated.gyp
+++ b/Source/bindings/modules/generated.gyp
@@ -22,11 +22,13 @@
   'targets': [
 ################################################################################
   {
+    # GN version: //third_party/WebKit/Source/bindings/modules:bindings_modules_generated
     # FIXME: Should be in modules, not bindings_modules http://crbug.com/358074
     'target_name': 'modules_event_generated',
     'type': 'none',
     'actions': [
       {
+        # GN version: //third_party/WebKit/Source/bindings/modules:modules_bindings_generated_event_interfaces
         'action_name': 'event_interfaces',
         'variables': {
           'event_idl_files': [
@@ -58,6 +60,7 @@
         ],
       },
       {
+        # GN version: //third_party/WebKit/Source/bindings/modules:bindings_modules_generated_event_modules_factory
         'action_name': 'EventModulesFactory',
         'inputs': [
           '<@(make_event_factory_files)',
@@ -77,6 +80,7 @@
         ],
       },
       {
+        # GN version: //third_party/WebKit/Source/bindings/modules:bindings_modules_generated_event_modules_names
         'action_name': 'EventModulesNames',
         'inputs': [
           '<@(make_names_files)',
@@ -95,6 +99,7 @@
         ],
       },
       {
+        # GN version: //third_party/WebKit/Source/bindings/modules:bindings_modules_generated_event_target_modules_factory
         'action_name': 'EventTargetModulesFactory',
         'inputs': [
           '<@(make_event_factory_files)',
@@ -113,6 +118,7 @@
         ],
       },
       {
+        # GN version: //third_party/WebKit/Source/bindings/modules:bindings_modules_generated_event_target_modules_names
         'action_name': 'EventTargetModulesNames',
         'inputs': [
           '<@(make_names_files)',
@@ -292,6 +298,7 @@
   },
 ################################################################################
   {
+    # GN version: //third_party/WebKit/Source/bindings/modules:interfaces_info
     'target_name': 'interfaces_info',
     'type': 'none',
     'dependencies': [