Fix invalid loop condition for Array.lastIndexOf().

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <algorithm>
 
 #include "src/v8.h"
 #include "src/allocation-site-scopes.h"
@@ skipping 8367 matching lines @@
   LoopBuilder::Direction direction;
   if (mode == kFirstIndexOf) {
     initial = graph()->GetConstant0();
     terminating = length;
     token = Token::LT;
     direction = LoopBuilder::kPostIncrement;
   } else {
     ASSERT_EQ(kLastIndexOf, mode);
     initial = length;
     terminating = graph()->GetConstant0();
-    token = Token::GTE;
+    token = Token::GT;
     direction = LoopBuilder::kPreDecrement;
   }
 
   Push(graph()->GetConstantMinus1());
   if (IsFastDoubleElementsKind(kind) || IsFastSmiElementsKind(kind)) {
     LoopBuilder loop(this, context(), direction);
     {
       HValue* index = loop.BeginBody(initial, terminating, token);
       HValue* element = AddUncasted<HLoadKeyed>(
           elements, index, static_cast<HValue*>(NULL),
@@ skipping 3656 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal