[inspector] fix compilation on win and linux

test/inspector/task-runner.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 "test/inspector/task-runner.h"
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
@@ skipping 114 matching lines @@
   v8::MicrotasksScope microtasks_scope(isolate,
                                        v8::MicrotasksScope::kRunMicrotasks);
   v8::HandleScope handle_scope(isolate);
   v8::Local<v8::Context> local_context = context.Get(isolate);
   v8::Context::Scope context_scope(local_context);
 
   v8::ScriptOrigin origin(v8::String::Empty(isolate));
   v8::Local<v8::String> source =
       v8::String::NewFromTwoByte(isolate, expression_.characters16(),
                                  v8::NewStringType::kNormal,
-                                 expression_.length())
+                                 static_cast<int>(expression_.length()))
           .ToLocalChecked();
 
   v8::ScriptCompiler::Source scriptSource(source, origin);
   v8::Local<v8::Script> script;
   if (!v8::ScriptCompiler::Compile(local_context, &scriptSource)
            .ToLocal(&script))
     return;
   v8::MaybeLocal<v8::Value> result;
   result = script->Run(local_context);
 }