Maintain API compatibility with older versions of V8.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 5375b88359320eb8a84f11f9e8651942541bd5da..d6770ccf28634a5241c6bb9b4177cfe364562d2c 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -357,6 +357,9 @@ typedef List<HeapObject*, PreallocatedStorageAllocationPolicy> DebugObjectCache;
   V(FunctionInfoListener*, active_function_info_listener, NULL)                \
   /* State for Relocatable. */                                                 \
   V(Relocatable*, relocatable_top, NULL)                                       \
+  /* State for CodeEntry in profile-generator. */                              \
+  V(CodeGenerator*, current_code_generator, NULL)                              \
+  V(bool, jump_target_compiling_deferred_code, false)                          \
   V(DebugObjectCache*, string_stream_debug_object_cache, NULL)                 \
   V(Object*, string_stream_current_security_token, NULL)                       \
   /* TODO(isolates): Release this on destruction? */                           \
@@ -368,6 +371,8 @@ typedef List<HeapObject*, PreallocatedStorageAllocationPolicy> DebugObjectCache;
   V(unsigned, ast_node_count, 0)                                               \
   /* SafeStackFrameIterator activations count. */                              \
   V(int, safe_stack_iterator_counter, 0)                                       \
+  V(CpuProfiler*, cpu_profiler, NULL)                                          \
+  V(HeapProfiler*, heap_profiler, NULL)                                        \
   V(bool, observer_delivery_pending, false)                                    \
   V(HStatistics*, hstatistics, NULL)                                           \
   V(HTracer*, htracer, NULL)                                                   \
@@ -779,7 +784,6 @@ class Isolate {
   // Out of resource exception helpers.
   Failure* StackOverflow();
   Failure* TerminateExecution();
-  void CancelTerminateExecution();
 
   // Administration
   void Iterate(ObjectVisitor* v);
@@ -975,9 +979,6 @@ class Isolate {
   inline bool IsDebuggerActive();
   inline bool DebuggerHasBreakPoints();
 
-  CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
-  HeapProfiler* heap_profiler() const { return heap_profiler_; }
-
 #ifdef DEBUG
   HistogramInfo* heap_histograms() { return heap_histograms_; }
 
@@ -1313,8 +1314,6 @@ class Isolate {
   Debugger* debugger_;
   Debug* debug_;
 #endif
-  CpuProfiler* cpu_profiler_;
-  HeapProfiler* heap_profiler_;
 
 #define GLOBAL_BACKING_STORE(type, name, initialvalue)                         \
   type name##_;