[debugger] remove debugger statement support from FCG/CS.

src/full-codegen/full-codegen.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/full-codegen/full-codegen.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 1205 matching lines @@
 }
 
 
 void FullCodeGenerator::VisitTryFinallyStatement(TryFinallyStatement* stmt) {
   // Exception handling is not supported.
   UNREACHABLE();
 }
 
 
 void FullCodeGenerator::VisitDebuggerStatement(DebuggerStatement* stmt) {
-  Comment cmnt(masm_, "[ DebuggerStatement");
-  SetStatementPosition(stmt);
-
-  __ DebugBreak();
-  __ MaybeDropFrames();
-
-  PrepareForBailoutForId(stmt->DebugBreakId(), BailoutState::NO_REGISTERS);
+  // Debugger statement is not supported.
+  UNREACHABLE();
 }
 
 
 void FullCodeGenerator::VisitCaseClause(CaseClause* clause) {
   UNREACHABLE();
 }
 
 
 void FullCodeGenerator::VisitConditional(Conditional* expr) {
   Comment cmnt(masm_, "[ Conditional");
@@ skipping 359 matching lines @@
 
 const FeedbackVectorSpec* FullCodeGenerator::feedback_vector_spec() const {
   return literal()->feedback_vector_spec();
 }
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8