Reduce number of deopts caused by ForceDelete.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 3047 matching lines @@
 
 
 bool v8::Object::ForceDelete(v8::Handle<Value> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::ForceDelete()", return false);
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
   i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
 
-  // When deleting a property on the global object using ForceDelete
-  // deoptimize all functions as optimized code does not check for the hole
-  // value with DontDelete properties.  We have to deoptimize all contexts
-  // because of possible cross-context inlined functions.
-  if (self->IsJSGlobalProxy() || self->IsGlobalObject()) {
-    i::Deoptimizer::DeoptimizeAll(isolate);
-  }
-
   EXCEPTION_PREAMBLE(isolate);
   i::Handle<i::Object> obj;
   has_pending_exception =
       !DeleteObjectProperty(isolate, self, key_obj,
                             i::JSReceiver::FORCE_DELETION).ToHandle(&obj);
   EXCEPTION_BAILOUT_CHECK(isolate, false);
   return obj->IsTrue();
 }
 
 
@@ skipping 4545 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal