[debugger] separate break point info from code instrumentation.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index b4d9de0fd157da66fe3400738ca44a73e4759ffc..571cd3ff9b66395a82411de91de0304353b6e16a 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -2222,26 +2222,21 @@ Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
   Handle<FixedArray> break_points(
       NewFixedArray(DebugInfo::kEstimatedNofBreakPointsInFunction));
 
+  // Make a copy of the bytecode array if available.
+  Handle<Object> maybe_debug_bytecode_array = undefined_value();
+  if (shared->HasBytecodeArray()) {
+    Handle<BytecodeArray> original(shared->bytecode_array());
+    maybe_debug_bytecode_array = CopyBytecodeArray(original);
+  }
+
   // Create and set up the debug info object. Debug info contains function, a
   // copy of the original code, the executing code and initial fixed array for
   // active break points.
   Handle<DebugInfo> debug_info =
       Handle<DebugInfo>::cast(NewStruct(DEBUG_INFO_TYPE));
   debug_info->set_shared(*shared);
-  if (shared->HasBytecodeArray()) {
-    // We need to create a copy, but delay since this may cause heap
-    // verification.
-    debug_info->set_abstract_code(AbstractCode::cast(shared->bytecode_array()));
-  } else {
-    debug_info->set_abstract_code(AbstractCode::cast(shared->code()));
-  }
+  debug_info->set_debug_bytecode_array(*maybe_debug_bytecode_array);
   debug_info->set_break_points(*break_points);
-  if (shared->HasBytecodeArray()) {
-    // Create a copy for debugging.
-    Handle<BytecodeArray> original(shared->bytecode_array());
-    Handle<BytecodeArray> copy = CopyBytecodeArray(original);
-    debug_info->set_abstract_code(AbstractCode::cast(*copy));
-  }
 
   // Link debug info to function.
   shared->set_debug_info(*debug_info);