DevTools: introduce perf monitor actions w/ time budget for violations that are event handlers.

third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp
index bea689d209f431c190aadf7a1f775c4a778ded85..80aa44dd7260023439ec109d05cb3663f05c7b95 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptEventListener.cpp
@@ -30,8 +30,10 @@
 
 #include "bindings/core/v8/ScriptEventListener.h"
 
+#include "bindings/core/v8/ScheduledAction.h"
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ScriptState.h"
+#include "bindings/core/v8/SourceLocation.h"
 #include "bindings/core/v8/V8AbstractEventListener.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/WindowProxy.h"
@@ -144,4 +146,17 @@ void getFunctionLocation(v8::Local<v8::Function> function,
   columnNumber = function->GetScriptColumnNumber();
 }
 
+std::unique_ptr<SourceLocation> getFunctionLocation(
+    ExecutionContext* executionContext,
+    EventListener* listener) {
+  v8::Isolate* isolate = toIsolate(executionContext);
+  v8::HandleScope handleScope(isolate);
+  v8::Local<v8::Object> handler =
+      eventListenerHandler(executionContext, listener);
+  if (handler.IsEmpty())
+    return nullptr;
+  return SourceLocation::fromFunction(
+      eventListenerEffectiveFunction(isolate, handler));
+}
+
 }  // namespace blink