[debugger] expose side-effect free evaluate to inspector.

src/runtime/runtime-debug.cc

 // Copyright 2014 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 "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/debug/debug-coverage.h"
 #include "src/debug/debug-evaluate.h"
@@ skipping 1192 matching lines @@
   isolate->debug()->ClearStepping();
   return isolate->heap()->undefined_value();
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugEvaluate) {
   HandleScope scope(isolate);
 
   // Check the execution state and decode arguments frame and source to be
   // evaluated.
-  DCHECK_EQ(4, args.length());
+  DCHECK_EQ(5, args.length());
   CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
   CHECK(isolate->debug()->CheckExecutionState(break_id));
 
   CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
   CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
   CONVERT_ARG_HANDLE_CHECKED(String, source, 3);
+  CONVERT_BOOLEAN_ARG_CHECKED(throw_on_side_effect, 4);
 
   StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
 
   RETURN_RESULT_OR_FAILURE(
-      isolate,
-      DebugEvaluate::Local(isolate, id, inlined_jsframe_index, source));
+      isolate, DebugEvaluate::Local(isolate, id, inlined_jsframe_index, source,
+                                    throw_on_side_effect));
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugEvaluateGlobal) {
   HandleScope scope(isolate);
 
   // Check the execution state and decode arguments frame and source to be
   // evaluated.
   DCHECK_EQ(2, args.length());
   CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
@@ skipping 705 matching lines @@
   if (enable) {
     Coverage::EnablePrecise(isolate);
   } else {
     Coverage::DisablePrecise(isolate);
   }
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8