[api] Disable in_process_stack_dumping in DefaultPlatform by default.

This flips the default value of in_process_stack_dumping from enabled
to disabled. For many embedders the V8 signal handler produces worse
stack trace than the defaul signal handler.

Change-Id: Idb5ec30dc4b3cefe243be7304d10a02f1dcda167
Reviewed-on: https://chromium-review.googlesource.com/977903
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52186}

include/libplatform/libplatform.h

@@ -38,7 +38,7 @@ V8_PLATFORM_EXPORT std::unique_ptr<v8::Platform> NewDefaultPlatform(
     int thread_pool_size = 0,
     IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
     InProcessStackDumping in_process_stack_dumping =
-        InProcessStackDumping::kEnabled,
+        InProcessStackDumping::kDisabled,
     std::unique_ptr<v8::TracingController> tracing_controller = {});
 
 V8_PLATFORM_EXPORT V8_DEPRECATE_SOON(
@@ -47,7 +47,7 @@ V8_PLATFORM_EXPORT V8_DEPRECATE_SOON(
         int thread_pool_size = 0,
         IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
         InProcessStackDumping in_process_stack_dumping =
-            InProcessStackDumping::kEnabled,
+            InProcessStackDumping::kDisabled,
         v8::TracingController* tracing_controller = nullptr));
 
 /**