Remove DebuggerAgent.

src/isolate.h

 // 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.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include "../include/v8-debug.h"
 #include "allocation.h"
 #include "assert-scope.h"
@@ skipping 57 matching lines @@
 template <StateTag Tag> class VMState;
 
 // 'void function pointer', used to roundtrip the
 // ExternalReference::ExternalReferenceRedirector since we can not include
 // assembler.h, where it is defined, here.
 typedef void* ExternalReferenceRedirectorPointer();
 
 
 class Debug;
 class Debugger;
-class DebuggerAgent;
 
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS
 class Redirection;
 class Simulator;
 #endif
 
 
 // Static indirection table for handles to constants.  If a frame
@@ skipping 262 matching lines @@
   V(int, ast_node_id, 0)                                                       \
   V(unsigned, ast_node_count, 0)                                               \
   V(bool, microtask_pending, false)                                            \
   V(bool, autorun_microtasks, true)                                            \
   V(HStatistics*, hstatistics, NULL)                                           \
   V(HTracer*, htracer, NULL)                                                   \
   V(CodeTracer*, code_tracer, NULL)                                            \
   V(bool, fp_stubs_generated, false)                                           \
   V(int, max_available_threads, 0)                                             \
   V(uint32_t, per_isolate_assert_data, 0xFFFFFFFFu)                            \
-  V(DebuggerAgent*, debugger_agent_instance, NULL)                             \
   V(InterruptCallback, api_interrupt_callback, NULL)                           \
   V(void*, api_interrupt_callback_data, NULL)                                  \
   ISOLATE_INIT_SIMULATOR_LIST(V)
 
 #define THREAD_LOCAL_TOP_ACCESSOR(type, name)                        \
   inline void set_##name(type v) { thread_local_top_.name##_ = v; }  \
   inline type name() const { return thread_local_top_.name##_; }
 
 
 class Isolate {
@@ skipping 1109 matching lines @@
   }
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_