Revert "Simplify debugger state."

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "v8.h"
 
 #include "accessors.h"
@@ skipping 11026 matching lines @@
   RUNTIME_ASSERT(obj->HasIndexedInterceptor());
   CONVERT_NUMBER_CHECKED(uint32_t, index, Uint32, args[1]);
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result, JSObject::GetElementWithInterceptor(obj, obj, index));
   return *result;
 }
 
 
 static bool CheckExecutionState(Isolate* isolate, int break_id) {
-  return !isolate->debug()->debug_context().is_null() &&
-         isolate->debug()->break_id() != 0 &&
-         isolate->debug()->break_id() == break_id;
+  return (isolate->debug()->break_id() != 0 &&
+          break_id == isolate->debug()->break_id());
 }
 
 
 RUNTIME_FUNCTION(Runtime_CheckExecutionState) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 1);
   CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
   RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
   return isolate->heap()->true_value();
 }
@@ skipping 4171 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal