Example:

~/v8$ tools/deprecation_stats.py include/v8.h --before=2018-10-01
Marked as V8_DEPRECATE_SOON: 21
     556 : 2017-11-15 11:00:49 : V8_INLINE void MarkIndependent()
     568 : 2017-11-15 11:00:49 : V8_INLINE bool IsIndependent() const
    2404 : 2018-09-24 13:05:31 : V8_WARN_UNUSED_RESULT MaybeLocal<Boolean> ToBoolean(Local<Context> context) const
    2421 : 2015-03-09 10:49:09 : Local<Number> ToNumber(Isolate* isolate) const
    2423 : 2015-03-09 10:49:09 : Local<String> ToString(Isolate* isolate) const
  <...>
    3416 : 2015-03-09 10:49:09 : Local<Array> GetOwnPropertyNames()
    3516 : 2015-03-09 10:49:09 : bool HasRealNamedProperty(Local<String> key)
    3533 : 2015-03-09 10:49:09 : bool HasRealIndexedProperty(uint32_t index)
    3537 : 2015-03-09 10:49:09 : bool HasRealNamedCallbackProperty(Local<String> key)
Marked as V8_DEPRECATED: 9
    1395 : 2018-09-21 23:40:51 : const CachedData* GetCachedData() const
    1853 : 2018-09-20 11:46:49 : MaybeLocal<Value> Parse(Isolate* isolate, Local<String> json_string)
    1953 : 2018-09-20 11:46:49 : std::vector<uint8_t> ReleaseBuffer()
    1977 : 2018-09-20 11:46:49 : void TransferSharedArrayBuffer(uint32_t transfer_id, Local<SharedArrayBuffer> shared_array_buffer)
    5093 : 2018-09-20 11:46:49 : Local<Value> New(Isolate* isolate, double time)
    6355 : 2018-09-20 11:46:49 : size_t max_semi_space_size()
    6361 : 2018-09-20 11:46:49 : void set_max_semi_space_size(size_t limit_in_mb)
    6380 : 2018-09-20 11:46:49 : size_t max_executable_size() const
    6384 : 2018-09-20 11:46:49 : void set_max_executable_size(size_t limit_in_mb)

R=delphick@chromium.org

Change-Id: I723055d30457a4061cdc589a4be09c0279fd5923
Reviewed-on: https://chromium-review.googlesource.com/c/1352307
Commit-Queue: Dan Elphick <delphick@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57906}