DCHECK for execution context being unsuspended during v8 bindings callback.

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

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 #include "{{v8_class}}.h"
 
 {% for filename in cpp_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
 {{v8_class}}::{{v8_class}}(v8::Local<v8::Function> callback, ScriptState* scriptState)
     : m_scriptState(scriptState) {
   m_callback.Set(scriptState->GetIsolate(), callback);
 }
 
 {{v8_class}}::~{{v8_class}}() {}
 
 DEFINE_TRACE({{v8_class}}) {
   {{cpp_class}}::Trace(visitor);
 }
 
 {% for method in methods if not method.is_custom %}
 {{method.cpp_type}} {{v8_class}}::{{method.name}}({{method.argument_declarations | join(', ')}}) {
   {% set return_default = 'return true'
          if method.idl_type == 'boolean' else 'return' %}{# void #}
   ExecutionContext* executionContext =
       ExecutionContext::From(m_scriptState.Get());
-  if (!executionContext || executionContext->IsContextSuspended() ||
-      executionContext->IsContextDestroyed())
+  DCHECK(!executionContext->IsContextSuspended());
+  if (!executionContext || executionContext->IsContextDestroyed())
     {{return_default}};
   if (!m_scriptState->ContextIsValid())
     {{return_default}};
 
   ScriptState::Scope scope(m_scriptState.Get());
   {% if method.call_with_this_handle %}
   v8::Local<v8::Value> thisHandle = thisValue.V8Value();
   {% endif %}
 
   {% for argument in method.arguments %}
@@ skipping 26 matching lines @@
                                {{method.arguments | length}},
                                argv,
                                isolate);
   {% endif %}
 }
 
 {% endfor %}
 }  // namespace blink
 
 {% endfilter %}{# format_blink_cpp_source_code #}