Do not disable V8's LiveEdit on startup.

third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp b/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
index 4d58a1bb06a6ee9783962cf7abcfe0f18988f6b1..b733f081701a3af4e54f3df28126183dc1475256 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
@@ -377,8 +377,6 @@ static void initializeV8Common(v8::Isolate* isolate) {
   isolate->SetEmbedderHeapTracer(
       V8PerIsolateData::from(isolate)->scriptWrappableVisitor());
 
-  v8::Debug::SetLiveEditEnabled(isolate, false);
-
   isolate->SetMicrotasksPolicy(v8::MicrotasksPolicy::kScoped);
 
   isolate->SetUseCounterCallback(&useCounterCallback);