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

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 9b1d01cd8f4ead1bab6e46f03c3ed362157f8c13..f399bc96931dae90e46c5f2f535215012a442414 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -7373,11 +7373,18 @@ void CpuProfiler::StartProfiling(Handle<String> title, bool record_samples) {
   IsDeadCheck(isolate, "v8::CpuProfiler::StartProfiling");
   i::CpuProfiler* profiler = isolate->cpu_profiler();
   ASSERT(profiler != NULL);
+  v8::Local<v8::Context> context = v8::Context::New(
+      reinterpret_cast<v8::Isolate*>(isolate));
+  v8::Context::Scope contextScope(context);
   profiler->StartProfiling(*Utils::OpenHandle(*title), record_samples);
 }
 
 
 void CpuProfiler::StartCpuProfiling(Handle<String> title, bool record_samples) {
+  i::Isolate* isolate = i::Isolate::Current();
+  v8::Local<v8::Context> context = v8::Context::New(
+      reinterpret_cast<v8::Isolate*>(isolate));
+  v8::Context::Scope contextScope(context);
   reinterpret_cast<i::CpuProfiler*>(this)->StartProfiling(
       *Utils::OpenHandle(*title), record_samples);
 }