[interpreter] Make d8's TryCatch block be verbose.

This changes "d8" to no longer report exceptions as being "caught" when
it comes to the catch prediction mechanism in our debugger. This treats
scripts as being truly top-level when it comes to exception handling and
will allow us to properly test the catch prediction mechanism using just
mjsunit tests alone.

R=yangguo@chromium.org
BUG=v8:4674
LOG=n

Review URL: https://codereview.chromium.org/1691723002

Cr-Commit-Position: refs/heads/master@{#33898}

src/d8.cc

@@ -375,6 +375,7 @@ bool Shell::ExecuteString(Isolate* isolate, Local<String> source,
                           bool report_exceptions, SourceType source_type) {
   HandleScope handle_scope(isolate);
   TryCatch try_catch(isolate);
+  try_catch.SetVerbose(true);
 
   MaybeLocal<Value> maybe_result;
   {
@@ -1247,6 +1248,10 @@ Local<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
   return global_template;
 }
 
+static void EmptyMessageCallback(Local<Message> message, Local<Value> error) {
+  // Nothing to be done here, exceptions thrown up to the shell will be reported
+  // separately by {Shell::ReportException} after they are caught.
+}
 
 void Shell::Initialize(Isolate* isolate) {
 #ifndef V8_SHARED
@@ -1254,6 +1259,8 @@ void Shell::Initialize(Isolate* isolate) {
   if (i::StrLength(i::FLAG_map_counters) != 0)
     MapCounters(isolate, i::FLAG_map_counters);
 #endif  // !V8_SHARED
+  // Disable default message reporting.
+  isolate->AddMessageListener(EmptyMessageCallback);
 }