[DevTools] Report unhandled exceptions and promise rejections through Runtime.

third_party/WebKit/Source/core/inspector/MainThreadDebugger.h

Index: third_party/WebKit/Source/core/inspector/MainThreadDebugger.h
diff --git a/third_party/WebKit/Source/core/inspector/MainThreadDebugger.h b/third_party/WebKit/Source/core/inspector/MainThreadDebugger.h
index f2af18bb05f828cb79e3760f4a597e74fd5b5857..618bc2d77a91b002a188c5e09d44ab9861c6aaa5 100644
--- a/third_party/WebKit/Source/core/inspector/MainThreadDebugger.h
+++ b/third_party/WebKit/Source/core/inspector/MainThreadDebugger.h
@@ -43,6 +43,7 @@ namespace blink {
 
 class LocalFrame;
 class SecurityOrigin;
+class SourceLocation;
 
 class CORE_EXPORT MainThreadDebugger final : public ThreadDebugger {
     WTF_MAKE_NONCOPYABLE(MainThreadDebugger);
@@ -64,10 +65,12 @@ public:
     InspectorTaskRunner* taskRunner() const { return m_taskRunner.get(); }
     bool isWorker() override { return false; }
     void setClientMessageLoop(std::unique_ptr<ClientMessageLoop>);
+    // TODO(dgozman): by making this method virtual, we can move many methods to ThreadDebugger and avoid some duplication. Should be careful about performance.
     int contextGroupId(LocalFrame*);
     void didClearContextsForFrame(LocalFrame*);
     void contextCreated(ScriptState*, LocalFrame*, SecurityOrigin*);
     void contextWillBeDestroyed(ScriptState*);
+    void exceptionUnhandled(LocalFrame*, const String& errorMessage, std::unique_ptr<SourceLocation>);
 
     void installAdditionalCommandLineAPI(v8::Local<v8::Context>, v8::Local<v8::Object>) override;