Allow configuring CPU profiler sampling interval

Source/bindings/v8/ScriptProfiler.cpp

Index: Source/bindings/v8/ScriptProfiler.cpp
diff --git a/Source/bindings/v8/ScriptProfiler.cpp b/Source/bindings/v8/ScriptProfiler.cpp
index f9f5604fd5137bb2793ee798f2a6dce0adbbaaa5..7027da6920c92ab3eb6f6728879a7dfd33fc10f0 100644
--- a/Source/bindings/v8/ScriptProfiler.cpp
+++ b/Source/bindings/v8/ScriptProfiler.cpp
@@ -50,6 +50,14 @@ namespace WebCore {
 
 typedef HashMap<String, double> ProfileNameIdleTimeMap;
 
+void ScriptProfiler::setSamplingInterval(int intervalUs)
+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    v8::CpuProfiler* profiler = isolate->GetCpuProfiler();
+    if (profiler)
+        profiler->SetSamplingInterval(intervalUs);
+}
+
 void ScriptProfiler::start(const String& title)
 {
     ProfileNameIdleTimeMap* profileNameIdleTimeMap = ScriptProfiler::currentProfileNameIdleTimeMap();