compositor-worker: Restrict the global interface in CompositorWorker.

Source/bindings/scripts/generate_global_constructors.py

Index: Source/bindings/scripts/generate_global_constructors.py
diff --git a/Source/bindings/scripts/generate_global_constructors.py b/Source/bindings/scripts/generate_global_constructors.py
index 7a27703b7c9874273206265257ca353de17c6d45..2fe860d0e33cc73831dd801963097c17c1d5abf9 100755
--- a/Source/bindings/scripts/generate_global_constructors.py
+++ b/Source/bindings/scripts/generate_global_constructors.py
@@ -36,6 +36,10 @@ HEADER_FORMAT = """// Stub header file for {{idl_basename}}
 // exists for each IDL file.
 """
 
+EXTRA_GLOBAL_NAME_FROM_MODULES = frozenset([
+    'CompositorWorker',

[haraken, 2015/04/22 11:07:28]

Can we avoid adding this here by tweaking ExposureSet in v8_utilities.py?

[sadrul, 2015/04/22 22:17:19]

The error I get without the change in this file is from the check below in line
176, with the following backtrace:

Traceback (most recent call last):
  File "../scripts/generate_global_constructors.py", line 195, in <module>
    sys.exit(main())
  File "../scripts/generate_global_constructors.py", line 181, in main
    % list(unknown_global_names))
ValueError: The following global names were used in [Exposed=xxx] but do not
match any [Global] / [PrimaryGlobal] interface: ['CompositorWorker']


I looked at v8_utilities, but it doesn't look like any of the v8_* files get
used from this file, and I couldn't figure out a way of using ExposureSet from
here. Perhaps you could direct me towards some code that I should look at?

+])
+
 def parse_options():
     parser = optparse.OptionParser()
     parser.add_option('--idl-files-list', help='file listing IDL files')
@@ -166,7 +170,8 @@ def main():
         record_global_constructors(idl_filename)
 
     # Check for [Exposed] / [Global] mismatch.
-    known_global_names = frozenset(itertools.chain.from_iterable(interface_name_to_global_names.values()))
+    known_global_names = set(itertools.chain.from_iterable(interface_name_to_global_names.values()))
+    known_global_names.update(EXTRA_GLOBAL_NAME_FROM_MODULES)
     exposed_global_names = frozenset(global_name_to_constructors)
     if not exposed_global_names.issubset(known_global_names):
         unknown_global_names = exposed_global_names.difference(known_global_names)