[debug] introduce precise binary code coverage.

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 <memory>
 #include <queue>
 
@@ skipping 968 matching lines @@
   bool NeedsSourcePositionsForProfiling() const;
 
   bool is_best_effort_code_coverage() const {
     return code_coverage_mode() == debug::Coverage::kBestEffort;
   }
 
   bool is_precise_count_code_coverage() const {
     return code_coverage_mode() == debug::Coverage::kPreciseCount;
   }
 
+  bool is_precise_binary_code_coverage() const {
+    return code_coverage_mode() == debug::Coverage::kPreciseBinary;
+  }
+
   void SetCodeCoverageList(Object* value);
 
   double time_millis_since_init() {
     return heap_.MonotonicallyIncreasingTimeInMs() - time_millis_at_init_;
   }
 
   DateCache* date_cache() {
     return date_cache_;
   }
 
@@ skipping 771 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_