[compiler] Drop the CompareNilIC.

src/log.cc

 // Copyright 2011 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/log.h"
 
 #include <cstdarg>
 #include <sstream>
 
 #include "src/bailout-reason.h"
@@ skipping 1516 matching lines @@
   AbstractCode* code_object = AbstractCode::cast(object);
   LogEventsAndTags tag = Logger::STUB_TAG;
   const char* description = "Unknown code from the snapshot";
   switch (code_object->kind()) {
     case AbstractCode::FUNCTION:
     case AbstractCode::INTERPRETED_FUNCTION:
     case AbstractCode::OPTIMIZED_FUNCTION:
       return;  // We log this later using LogCompiledFunctions.
     case AbstractCode::BINARY_OP_IC:    // fall through
     case AbstractCode::COMPARE_IC:      // fall through
-    case AbstractCode::COMPARE_NIL_IC:  // fall through
     case AbstractCode::TO_BOOLEAN_IC:   // fall through
 
     case AbstractCode::STUB:
       description =
           CodeStub::MajorName(CodeStub::GetMajorKey(code_object->GetCode()));
       if (description == NULL)
         description = "A stub from the snapshot";
       tag = Logger::STUB_TAG;
       break;
     case AbstractCode::REGEXP:
@@ skipping 289 matching lines @@
     removeCodeEventListener(jit_logger_);
     delete jit_logger_;
     jit_logger_ = NULL;
   }
 
   return log_->Close();
 }
 
 }  // namespace internal
 }  // namespace v8