IDL compiler: Record is_partial/is_mixin in CodeGeneratorInfo

The bindings generator needs to know whether a member is defined
in a partial and/or mixin IDL fragment in order to make a Blink
API call.  Thus, records such information in CodeGeneratorInfo.

Bug: 839389
Change-Id: I997e518c842e93d392846bf63480a9b8e0f7e1ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942894
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720422}

third_party/blink/renderer/bindings/scripts/web_idl/code_generator_info.py

@@ -5,6 +5,8 @@
 # The list of attributes that CodeGeneratorInfo supports.  CodeGeneratorInfo's
 # attributes are auto-generated from this list because they're boilerplated.
 _CODE_GENERATOR_INFO_ATTRIBUTES = (
+    'defined_in_mixin',
+    'defined_in_partial',
     'property_implemented_as',
     'receiver_implemented_as',
 )

third_party/blink/renderer/bindings/scripts/web_idl/idl_compiler.py

@@ -77,6 +77,7 @@ class IdlCompiler(object):
         self._did_run = True
 
         # Merge partial definitions.
+        self._record_defined_in_partial_and_mixin()
         self._propagate_extattrs_per_idl_fragment()
         self._merge_partial_interface_likes()
         self._merge_partial_dictionaries()
@@ -106,6 +107,25 @@ class IdlCompiler(object):
 
         return Database(self._db)
 
+    def _record_defined_in_partial_and_mixin(self):
+        old_irs = self._ir_map.irs_of_kinds(
+            IRMap.IR.Kind.DICTIONARY, IRMap.IR.Kind.INTERFACE,
+            IRMap.IR.Kind.INTERFACE_MIXIN, IRMap.IR.Kind.NAMESPACE,
+            IRMap.IR.Kind.PARTIAL_DICTIONARY, IRMap.IR.Kind.PARTIAL_INTERFACE,
+            IRMap.IR.Kind.PARTIAL_INTERFACE_MIXIN,
+            IRMap.IR.Kind.PARTIAL_NAMESPACE)
+
+        self._ir_map.move_to_new_phase()
+
+        for old_ir in old_irs:
+            new_ir = make_copy(old_ir)
+            self._ir_map.add(new_ir)
+            for member in new_ir.iter_all_members():
+                member.code_generator_info.set_defined_in_partial(
+                    hasattr(new_ir, 'is_partial') and new_ir.is_partial)
+                member.code_generator_info.set_defined_in_mixin(
+                    hasattr(new_ir, 'is_mixin') and new_ir.is_mixin)
+
     def _propagate_extattrs_per_idl_fragment(self):
         def propagate_extattr(extattr_key_and_attr_name,
                               bag=None,