[inspector] fix compilation on win and linux

BUG=chromium:635948
R=dgozman@chromium.org,machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2389133004
Cr-Commit-Position: refs/heads/master@{#40003}

src/inspector/string-16.cc

@@ -375,7 +375,7 @@ String16 String16::fromInteger(int number) {
 String16 String16::fromInteger(size_t number) {
   const size_t kBufferSize = 50;
   char buffer[kBufferSize];
-  std::snprintf(buffer, kBufferSize, "%zu", number);
+  v8::base::OS::SNPrintF(buffer, kBufferSize, "%zu", number);
   return String16(buffer);
 }
 

test/inspector/inspector-test.cc

@@ -127,7 +127,6 @@ class SetTimeoutExtension : public v8::Extension {
 
  private:
   static void SetTimeout(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    v8::Isolate* isolate = args.GetIsolate();
     if (args.Length() != 2 || !args[1]->IsNumber() ||
         (!args[0]->IsFunction() && !args[0]->IsString()) ||
         args[1].As<v8::Number>()->Value() != 0.0) {

test/inspector/task-runner.cc

@@ -132,7 +132,7 @@ void ExecuteStringTask::Run(v8::Isolate* 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);