Debugger: refactor ScopeIterator, FrameInspector and DebugEvaluate.

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 34 matching lines @@
 using ::v8::base::ConditionVariable;
 using ::v8::base::OS;
 using ::v8::base::Semaphore;
 using ::v8::internal::EmbeddedVector;
 using ::v8::internal::Object;
 using ::v8::internal::Handle;
 using ::v8::internal::Heap;
 using ::v8::internal::JSGlobalProxy;
 using ::v8::internal::Code;
 using ::v8::internal::Debug;
-using ::v8::internal::Debugger;
 using ::v8::internal::CommandMessage;
 using ::v8::internal::CommandMessageQueue;
 using ::v8::internal::StackFrame;
 using ::v8::internal::StepAction;
 using ::v8::internal::StepIn;  // From StepAction enum
 using ::v8::internal::StepNext;  // From StepAction enum
 using ::v8::internal::StepOut;  // From StepAction enum
 using ::v8::internal::Vector;
 using ::v8::internal::StrLength;
 
@@ skipping 7547 matching lines @@
       "let y = 2;               \n"
       "debugger;                \n"
       "x * y",
       30);
   ExpectInt32(
       "x = 1; y = 2; \n"
       "debugger;"
       "x * y",
       30);
 }