Move a bunch of GC related files to heap/ subdirectory

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
 v8_compress_startup_data = "off"
 v8_deprecation_warnings = false
 v8_enable_disassembler = false
 v8_enable_gdbjit = false
@@ skipping 614 matching lines @@
     "src/flag-definitions.h",
     "src/flags.cc",
     "src/flags.h",
     "src/frames-inl.h",
     "src/frames.cc",
     "src/frames.h",
     "src/full-codegen.cc",
     "src/full-codegen.h",
     "src/func-name-inferrer.cc",
     "src/func-name-inferrer.h",
-    "src/gc-tracer.cc",
-    "src/gc-tracer.h",
     "src/gdb-jit.cc",
     "src/gdb-jit.h",
     "src/global-handles.cc",
     "src/global-handles.h",
     "src/globals.h",
     "src/handles-inl.h",
     "src/handles.cc",
     "src/handles.h",
     "src/hashmap.h",
-    "src/heap-inl.h",
     "src/heap-profiler.cc",
     "src/heap-profiler.h",
     "src/heap-snapshot-generator-inl.h",
     "src/heap-snapshot-generator.cc",
     "src/heap-snapshot-generator.h",
-    "src/heap.cc",
-    "src/heap.h",
+    "src/heap/gc-tracer.cc",
+    "src/heap/gc-tracer.h",
+    "src/heap/heap-inl.h",
+    "src/heap/heap.cc",
+    "src/heap/heap.h",
+    "src/heap/incremental-marking.cc",
+    "src/heap/incremental-marking.h",
+    "src/heap/mark-compact-inl.h",
+    "src/heap/mark-compact.cc",
+    "src/heap/mark-compact.h",
+    "src/heap/spaces-inl.h",
+    "src/heap/spaces.cc",
+    "src/heap/spaces.h",
+    "src/heap/sweeper-thread.h",
+    "src/heap/sweeper-thread.cc",
     "src/hydrogen-alias-analysis.h",
     "src/hydrogen-bce.cc",
     "src/hydrogen-bce.h",
     "src/hydrogen-bch.cc",
     "src/hydrogen-bch.h",
     "src/hydrogen-canonicalize.cc",
     "src/hydrogen-canonicalize.h",
     "src/hydrogen-check-elimination.cc",
     "src/hydrogen-check-elimination.h",
     "src/hydrogen-dce.cc",
@@ skipping 39 matching lines @@
     "src/hydrogen-types.h",
     "src/hydrogen-uint32-analysis.cc",
     "src/hydrogen-uint32-analysis.h",
     "src/i18n.cc",
     "src/i18n.h",
     "src/icu_util.cc",
     "src/icu_util.h",
     "src/ic-inl.h",
     "src/ic.cc",
     "src/ic.h",
-    "src/incremental-marking.cc",
-    "src/incremental-marking.h",
     "src/interface.cc",
     "src/interface.h",
     "src/interpreter-irregexp.cc",
     "src/interpreter-irregexp.h",
     "src/isolate.cc",
     "src/isolate.h",
     "src/json-parser.h",
     "src/json-stringifier.h",
     "src/jsregexp-inl.h",
     "src/jsregexp.cc",
@@ skipping 10 matching lines @@
     "src/liveedit.cc",
     "src/liveedit.h",
     "src/log-inl.h",
     "src/log-utils.cc",
     "src/log-utils.h",
     "src/log.cc",
     "src/log.h",
     "src/lookup.cc",
     "src/lookup.h",
     "src/macro-assembler.h",
-    "src/mark-compact.cc",
-    "src/mark-compact.h",
     "src/messages.cc",
     "src/messages.h",
     "src/msan.h",
     "src/natives.h",
     "src/objects-debug.cc",
     "src/objects-inl.h",
     "src/objects-printer.cc",
     "src/objects-visiting.cc",
     "src/objects-visiting.h",
     "src/objects.cc",
@@ skipping 47 matching lines @@
     "src/scopeinfo.h",
     "src/scopes.cc",
     "src/scopes.h",
     "src/serialize.cc",
     "src/serialize.h",
     "src/small-pointer-list.h",
     "src/smart-pointers.h",
     "src/snapshot-source-sink.cc",
     "src/snapshot-source-sink.h",
     "src/snapshot.h",
-    "src/spaces-inl.h",
-    "src/spaces.cc",
-    "src/spaces.h",
     "src/store-buffer-inl.h",
     "src/store-buffer.cc",
     "src/store-buffer.h",
     "src/string-search.cc",
     "src/string-search.h",
     "src/string-stream.cc",
     "src/string-stream.h",
     "src/strtod.cc",
     "src/strtod.h",
     "src/stub-cache.cc",
     "src/stub-cache.h",
-    "src/sweeper-thread.h",
-    "src/sweeper-thread.cc",
     "src/token.cc",
     "src/token.h",
     "src/transitions-inl.h",
     "src/transitions.cc",
     "src/transitions.h",
     "src/type-info.cc",
     "src/type-info.h",
     "src/types-inl.h",
     "src/types.cc",
     "src/types.h",
@@ skipping 443 matching lines @@
     deps = [
       ":v8_base",
       ":v8_nosnapshot",
     ]
   }
 
   direct_dependent_configs = [ ":external_config" ]
 }
 
 }