[inspector] Build inspector under v8_enable_inspector build flag.

src/inspector/V8Console.h

 // 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.
 
 #ifndef V8_INSPECTOR_V8CONSOLE_H_
 #define V8_INSPECTOR_V8CONSOLE_H_
 
 #include "src/inspector/Allocator.h"
 
-#include <v8.h>
+#include "include/v8.h"
 
 namespace v8_inspector {
 
 class InspectedContext;
 
 // Console API
 // https://console.spec.whatwg.org/#console-interface
 class V8Console {
  public:
   static v8::Local<v8::Object> createConsole(InspectedContext*,
@@ skipping 89 matching lines @@
   }
   static void inspectedObject4(
       const v8::FunctionCallbackInfo<v8::Value>& info) {
     inspectedObject(info, 4);
   }
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8CONSOLE_H_