DevTools: CPUProfiler: provide url for scripts that have sourceURL property.

src/cpu-profiler.cc

Index: src/cpu-profiler.cc
diff --git a/src/cpu-profiler.cc b/src/cpu-profiler.cc
index 42722191bd5a0cce0c9bdb7d8a909cbd3d30fb2a..b95b7d85968d10afe453830c790975a4c46eeffd 100644
--- a/src/cpu-profiler.cc
+++ b/src/cpu-profiler.cc
@@ -437,6 +437,10 @@ void CpuProfiler::ResetProfiles() {
 }
 
 void CpuProfiler::StartProfiling(const char* title, bool record_samples) {
+  i::HandleScope scope(isolate_);
+  v8::Local<v8::Context> context = v8::Context::New(
+      reinterpret_cast<v8::Isolate*>(isolate_));
+  v8::Context::Scope contextScope(context);
   if (profiles_->StartProfiling(title, next_profile_uid_++, record_samples)) {
     StartProcessorIfNotStarted();
   }