[inspector] Build inspector under v8_enable_inspector build flag.

src/inspector/V8InternalValueType.cpp

 // 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/V8InternalValueType.h"
 
 #include "src/inspector/ProtocolPlatform.h"
 #include "src/inspector/StringUtil.h"
 
 namespace v8_inspector {
@@ skipping 11 matching lines @@
   switch (type) {
     case V8InternalValueType::kEntry:
       return toV8StringInternalized(isolate, "internal#entry");
     case V8InternalValueType::kLocation:
       return toV8StringInternalized(isolate, "internal#location");
     case V8InternalValueType::kScope:
       return toV8StringInternalized(isolate, "internal#scope");
     case V8InternalValueType::kScopeList:
       return toV8StringInternalized(isolate, "internal#scopeList");
   }
-  NOTREACHED();
+  UNREACHABLE();
   return v8::Local<v8::String>();
 }
 
 }  // namespace
 
 bool markAsInternal(v8::Local<v8::Context> context,
                     v8::Local<v8::Object> object, V8InternalValueType type) {
   v8::Isolate* isolate = context->GetIsolate();
   v8::Local<v8::Private> privateValue = internalSubtypePrivate(isolate);
   v8::Local<v8::String> subtype = subtypeForInternalType(isolate, type);
@@ skipping 25 matching lines @@
   if (!object->HasPrivate(context, privateValue).FromMaybe(false))
     return v8::Null(isolate);
   v8::Local<v8::Value> subtypeValue;
   if (!object->GetPrivate(context, privateValue).ToLocal(&subtypeValue) ||
       !subtypeValue->IsString())
     return v8::Null(isolate);
   return subtypeValue;
 }
 
 }  // namespace v8_inspector