Revert of [inspector] fix timestamp formatting with non C locales

src/inspector/v8-console-message.cc

 // Copyright 2016 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/inspector/v8-console-message.h"
 
 #include "src/inspector/inspected-context.h"
 #include "src/inspector/protocol/Protocol.h"
 #include "src/inspector/string-util.h"
 #include "src/inspector/v8-console-agent-impl.h"
@@ skipping 75 matching lines @@
     if (value.IsEmpty()) return true;
     if ((ignoreOptions & IgnoreNull) && value->IsNull()) return true;
     if ((ignoreOptions & IgnoreUndefined) && value->IsUndefined()) return true;
     if (value->IsString()) return append(v8::Local<v8::String>::Cast(value));
     if (value->IsStringObject())
       return append(v8::Local<v8::StringObject>::Cast(value)->ValueOf());
     if (value->IsSymbol()) return append(v8::Local<v8::Symbol>::Cast(value));
     if (value->IsSymbolObject())
       return append(v8::Local<v8::SymbolObject>::Cast(value)->ValueOf());
     if (value->IsNumberObject()) {
-      m_builder.append(String16::fromDouble(
-          v8::Local<v8::NumberObject>::Cast(value)->ValueOf(), 6));
+      m_builder.append(String16::fromDoublePrecision6(
+          v8::Local<v8::NumberObject>::Cast(value)->ValueOf()));
       return true;
     }
     if (value->IsBooleanObject()) {
       m_builder.append(v8::Local<v8::BooleanObject>::Cast(value)->ValueOf()
                            ? "true"
                            : "false");
       return true;
     }
     if (value->IsArray()) return append(v8::Local<v8::Array>::Cast(value));
     if (value->IsProxy()) {
@@ skipping 356 matching lines @@
           m_inspector->sessionForContextGroup(m_contextGroupId))
     session->releaseObjectGroup("console");
 }
 
 void V8ConsoleMessageStorage::contextDestroyed(int contextId) {
   for (size_t i = 0; i < m_messages.size(); ++i)
     m_messages[i]->contextDestroyed(contextId);
 }
 
 }  // namespace v8_inspector