[inspector] fix timestamp formatting with non C locales

src/inspector/v8-console-message.cc

Index: src/inspector/v8-console-message.cc
diff --git a/src/inspector/v8-console-message.cc b/src/inspector/v8-console-message.cc
index 87c9d68d9b3514e5971458cbb29fd20c1e50b7d1..1f50571ded02cce31e1dca0b2ba7621c246f577e 100644
--- a/src/inspector/v8-console-message.cc
+++ b/src/inspector/v8-console-message.cc
@@ -93,8 +93,8 @@ class V8ValueStringBuilder {
     if (value->IsSymbolObject())
       return append(v8::Local<v8::SymbolObject>::Cast(value)->ValueOf());
     if (value->IsNumberObject()) {
-      m_builder.append(String16::fromDoublePrecision6(
-          v8::Local<v8::NumberObject>::Cast(value)->ValueOf()));
+      m_builder.append(String16::fromDouble(
+          v8::Local<v8::NumberObject>::Cast(value)->ValueOf(), 6));
       return true;
     }
     if (value->IsBooleanObject()) {