bindings: Store ScriptState in generated callback functions

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

 {% from 'utilities.cpp.tmpl' import v8_value_to_local_cpp_value %}
 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 
 #include "{{cpp_class}}.h"
 
 {% for filename in cpp_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
-{{cpp_class}}::{{cpp_class}}(v8::Isolate* isolate, v8::Local<v8::Function> callback)
-    : m_callback(isolate, callback)
+{{cpp_class}}::{{cpp_class}}(ScriptState* scriptState, v8::Local<v8::Function> callback)
+    : m_scriptState(scriptState),
+    m_callback(scriptState->isolate(), callback)
 {
     DCHECK(!m_callback.isEmpty());
     m_callback.setPhantom();
 }
 
 DEFINE_TRACE({{cpp_class}})
 {
 }
 
 DEFINE_TRACE_WRAPPERS({{cpp_class}})
 {
     visitor->traceWrappers(&m_callback.cast<v8::Object>());
 }
 
 bool {{cpp_class}}::call({{argument_declarations | join(', ')}})
 {
-    if (!scriptState->contextIsValid())
+    if (!m_scriptState->contextIsValid())
         return false;
 
-    ExecutionContext* context = scriptState->getExecutionContext();
+    ExecutionContext* context = m_scriptState->getExecutionContext();
     DCHECK(context);
     if (context->activeDOMObjectsAreSuspended() || context->activeDOMObjectsAreStopped())
         return false;
 
     if (m_callback.isEmpty())
         return false;
 
     // TODO(bashi): Make sure that using TrackExceptionState is OK.
     // crbug.com/653769
     TrackExceptionState exceptionState;
-    ScriptState::Scope scope(scriptState);
+    ScriptState::Scope scope(m_scriptState.get());
 
     {% for argument in arguments %}
     v8::Local<v8::Value> {{argument.argument_name}} = {{argument.cpp_value_to_v8_value}};
     {% endfor %}
 
-    v8::Local<v8::Value> thisValue = toV8(scriptWrappable, scriptState->context()->Global(), scriptState->isolate());
+    v8::Local<v8::Value> thisValue = toV8(scriptWrappable, m_scriptState->context()->Global(), m_scriptState->isolate());
 
     {% if arguments %}
     v8::Local<v8::Value> argv[] = { {{arguments | join(', ', 'argument_name')}} };
     {% else %}
     {# Empty array initializers are illegal, and don\'t compile in MSVC. #}
     v8::Local<v8::Value> *argv = nullptr;
     {% endif %}
 
     v8::Local<v8::Value> v8ReturnValue;
-    v8::TryCatch exceptionCatcher(scriptState->isolate());
+    v8::TryCatch exceptionCatcher(m_scriptState->isolate());
     exceptionCatcher.SetVerbose(true);
 
-    if (V8ScriptRunner::callFunction(m_callback.newLocal(scriptState->isolate()), scriptState->getExecutionContext(), thisValue, {{arguments | length}}, argv, scriptState->isolate()).ToLocal(&v8ReturnValue))
+    if (V8ScriptRunner::callFunction(m_callback.newLocal(m_scriptState->isolate()), m_scriptState->getExecutionContext(), thisValue, {{arguments | length}}, argv, m_scriptState->isolate()).ToLocal(&v8ReturnValue))
     {
         {% if return_value %}
         {{v8_value_to_local_cpp_value(return_value) | indent(8)}}
         returnValue = cppValue;
         {% endif %}
         return true;
     }
     return false;
 }
 
 } // namespace blink
 
 {% endfilter %}{# format_blink_cpp_source_code #}