[inspector] enabled presubmit for inspector sub folder

src/inspector/V8ConsoleMessage.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/V8ConsoleMessage.h"
 
 #include "src/inspector/InspectedContext.h"
 #include "src/inspector/StringUtil.h"
 #include "src/inspector/V8ConsoleAgentImpl.h"
 #include "src/inspector/V8InspectorImpl.h"
@@ skipping 57 matching lines @@
     if (!builder.append(value)) return String16();
     return builder.toString();
   }
 
  private:
   enum {
     IgnoreNull = 1 << 0,
     IgnoreUndefined = 1 << 1,
   };
 
-  V8ValueStringBuilder(v8::Isolate* isolate)
+  explicit V8ValueStringBuilder(v8::Isolate* isolate)
       : m_arrayLimit(maxArrayItemsLimit),
         m_isolate(isolate),
         m_tryCatch(isolate) {}
 
   bool append(v8::Local<v8::Value> value, unsigned ignoreOptions = 0) {
     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())
@@ skipping 368 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