[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl

Index: third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl
diff --git a/third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl b/third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl
index d15a65c87308e8c4e34715313e5f49523e9470b0..682f2f1b582b59034e5f34ea8b401c7da7ba6470 100644
--- a/third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl
+++ b/third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl
@@ -421,9 +421,15 @@ static const V8DOMConfiguration::MethodConfiguration {{v8_class}}Methods[] = {
 {% from 'constants.cpp.tmpl' import install_constants with context %}
 {% from 'methods.cpp.tmpl' import method_configuration with context %}
 {% if has_partial_interface or is_partial %}
-void {{v8_class_or_partial}}::install{{v8_class}}Template(v8::Isolate* isolate, const DOMWrapperWorld& world, v8::Local<v8::FunctionTemplate> interfaceTemplate) {
+void {{v8_class_or_partial}}::install{{v8_class}}Template(
+    v8::Isolate* isolate,
+    const DOMWrapperWorld& world,
+    v8::Local<v8::FunctionTemplate> interfaceTemplate) {
 {% else %}
-static void install{{v8_class}}Template(v8::Isolate* isolate, const DOMWrapperWorld& world, v8::Local<v8::FunctionTemplate> interfaceTemplate) {
+static void install{{v8_class}}Template(
+    v8::Isolate* isolate,
+    const DOMWrapperWorld& world,
+    v8::Local<v8::FunctionTemplate> interfaceTemplate) {
 {% endif %}
   // Initialize the interface object's template.
   {% if is_partial %}
@@ -469,7 +475,7 @@ static void install{{v8_class}}Template(v8::Isolate* isolate, const DOMWrapperWo
   instanceTemplate->SetImmutableProto();
   {% endif %}
 
-  // Register DOM constants, attributes and operations.
+  // Register IDL constants, attributes and operations.
   {% if constants %}
   {{install_constants() | indent(2)}}
   {% endif %}
@@ -642,17 +648,22 @@ static void install{{v8_class}}Template(v8::Isolate* isolate, const DOMWrapperWo
         attribute_configuration,
         with context %}
 {% from 'methods.cpp.tmpl' import install_custom_signature with context %}
-void {{v8_class_or_partial}}::installRuntimeEnabledFeatures(v8::Isolate* isolate, const DOMWrapperWorld& world, v8::Local<v8::Object> instance, v8::Local<v8::Object> prototype, v8::Local<v8::Function> interface) {
+void {{v8_class_or_partial}}::InstallRuntimeEnabledFeatures(
+    v8::Isolate* isolate,
+    const DOMWrapperWorld& world,
+    v8::Local<v8::Object> instance,
+    v8::Local<v8::Object> prototype,
+    v8::Local<v8::Function> interface) {
   {% if runtime_enabled_feature_name %}
 #error "We don't expect a runtime enabled interface {{v8_class_or_partial}} to have installRuntimeEnabledFeatures()."
   {% endif %}
 
   {% if is_partial %}
-  {{v8_class}}::installRuntimeEnabledFeatures(isolate, world, instance, prototype, interface);
+  {{v8_class}}::InstallRuntimeEnabledFeatures(isolate, world, instance, prototype, interface);
   {% endif %}
 
-  v8::Local<v8::FunctionTemplate> interfaceTemplate = {{v8_class}}::wrapperTypeInfo.domTemplate(isolate, world);
-  v8::Local<v8::Signature> signature = v8::Signature::New(isolate, interfaceTemplate);
+  v8::Local<v8::FunctionTemplate> interface_template = {{v8_class}}::wrapperTypeInfo.domTemplate(isolate, world);
+  v8::Local<v8::Signature> signature = v8::Signature::New(isolate, interface_template);
   ALLOW_UNUSED_LOCAL(signature);
 
   {# TODO(peria): Generate code to install constants. It depends on runtime_enabled_feaure of this interface. #}
@@ -683,12 +694,7 @@ void {{v8_class_or_partial}}::installRuntimeEnabledFeatures(v8::Isolate* isolate
   {% endfor %}
 
   {% if iterator_method and iterator_method.runtime_enabled_feature_name %}
-  {% filter exposed(iterator_method.exposed_test) %}
-  {% filter runtime_enabled(iterator_method.runtime_enabled_feature_name) %}
-  // Runtime enabled iterator (@@iterator)
-#error "{{v8_class_or_partial}} should not have runtime enabled iterators."
-  {% endfilter %}
-  {% endfilter %}
+#error "{{v8_class_or_partial}} should not have runtime enabled iterator (@@iterator)."
   {% endif %}
 
   {% if methods | custom_registration(is_partial) %}
@@ -711,6 +717,110 @@ void {{v8_class_or_partial}}::installRuntimeEnabledFeatures(v8::Isolate* isolate
   {% endif %}
 }
 
+void {{v8_class_or_partial}}::InstallRuntimeEnabledFeaturesOnTemplate(
+    v8::Isolate* isolate,
+    const DOMWrapperWorld& world,
+    v8::Local<v8::FunctionTemplate> interface_template) {
+  {% if runtime_enabled_feature_name %}
+#error "We don't expect a runtime enabled interface {{v8_class_or_partial}} to have InstallRuntimeEnabledFeaturesOnTemplate()."
+  {% endif %}
+
+  {% if is_partial %}
+  {{v8_class}}::InstallRuntimeEnabledFeaturesOnTemplate(isolate, world, interface_template);
+  {% endif %}
+
+  v8::Local<v8::Signature> signature = v8::Signature::New(isolate, interface_template);
+  ALLOW_UNUSED_LOCAL(signature);
+  v8::Local<v8::ObjectTemplate> instance_template = interface_template->InstanceTemplate();
+  ALLOW_UNUSED_LOCAL(instance_template);
+  v8::Local<v8::ObjectTemplate> prototype_template = interface_template->PrototypeTemplate();
+  ALLOW_UNUSED_LOCAL(prototype_template);
+
+  // Register IDL constants, attributes and operations.
+  {% for feature_name, constants_list in constants | selectattr('runtime_enabled_feature_name') | groupby('runtime_enabled_feature_name') %}
+  {% filter runtime_enabled(feature_name) %}
+  static const V8DOMConfiguration::ConstantConfiguration constant_configurations = {
+      {% for constant in constants_list %}
+      {{constant_configuration(constant) | indent(6)}},
+      {% endfor %}
+  }
+  V8DOMConfiguration::InstallConstants(
+      isolate, interface_template, prototype_template,
+      constant_configurations, WTF_ARRAY_LENGTH(constant_configurations));
+  {% endfilter %}
+  {% endfor %}
+
+  {% for feature_name, attribute_list in runtime_enabled_attributes | selectattr('is_data_type_property') | groupby('runtime_enabled_feature_name') %}
+  {% filter runtime_enabled(feature_name) %}
+  static const V8DOMConfiguration::AttributeConfiguration attribute_configurations[] = {
+      {% for attribute in attribute_list | sort %}
+      {{attribute_configuration(attribute) | indent(6)}},
+      {% endfor %}
+  };
+  V8DOMConfiguration::InstallAttributes(
+      isolate, world, instance_template, prototype_template,
+      attribute_configurations, WTF_ARRAY_LENGTH(attribute_configurations));
+  {% endfilter %}
+  {% endfor %}
+
+  {% for feature_name, attribute_list in runtime_enabled_attributes | selectattr('is_data_type_property', 'equalto', False) | groupby('runtime_enabled_feature_name') %}
+  {% filter runtime_enabled(feature_name) %}
+  static const V8DOMConfiguration::AccessorConfiguration accessor_configurations[] = {
+      {% for attribute in attribute_list | sort %}
+      {{accessor_configuration(attribute) | indent(6)}},
+      {% endfor %}
+  };
+  V8DOMConfiguration::InstallAccessors(
+      isolate, world, instance_template, prototype_template, interface_template,
+      signature, accessor_configurations,
+      WTF_ARRAY_LENGTH(accessor_configurations));
+  {% endfilter %}
+  {% endfor %}
+
+  {% if iterator_method and iterator_method.runtime_enabled_feature_name %}
+  {% filter exposed(iterator_method.exposed_test) %}
+  {% filter runtime_enabled(iterator_method.runtime_enabled_feature_name) %}
+  {% set symbol_alias = '"%s"' % iterator_method_alias
+                        if iterator_method_alias else 'nullptr' %}
+  // Iterator (@@iterator)
+  static const V8DOMConfiguration::SymbolKeyedMethodConfiguration
+      symbol_keyed_iterator_configuration = {
+      v8::Symbol::GetIterator,
+      {{symbol_alias}},
+      {{v8_class_or_partial}}::iteratorMethodCallback,
+      0,
+      v8::DontEnum,
+      V8DOMConfiguration::kOnPrototype,
+      V8DOMConfiguration::kCheckHolder,
+      V8DOMConfiguration::kDoNotCheckAccess
+  };
+  V8DOMConfiguration::InstallMethod(
+      isolate, world, prototype_template, signature,
+      symbol_keyed_iterator_configuration);
+  {% endfilter %}
+  {% endfilter %}
+  {% endif %}
+
+  {% if methods | custom_registration(is_partial) %}
+  {% for method in methods | custom_registration(is_partial) %}
+  {% filter exposed(method.overloads.exposed_test_all
+                    if method.overloads else method.exposed_test) %}
+  {% set feature_name = method.overloads.runtime_enabled_all
+        if method.overloads else method.runtime_enabled_feature_name %}
+  {% if feature_name %}
+  {% filter runtime_enabled(feature_name) %}
+  {% if method.is_cross_origin %}
+  {{install_origin_safe_method(method, 'instance_template', 'prototype_template') | indent(2)}}
+  {% else %}
+  {{install_custom_signature(method, 'instance_template', 'prototype_template', 'interface_template', 'signature') | indent(2)}}
+  {% endif %}
+  {% endfilter %}
+  {% endif %}
+  {% endfilter %}
+  {% endfor %}
+  {% endif %}
+}
+
 {% endif %}{# needs_runtime_enabled_installer #}
 {% endblock %}
 {##############################################################################}