Devirtualize Visitor and remove inline visitor specialization.

third_party/WebKit/Source/platform/heap/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.
 
 import("//testing/test.gni")
 
 source_set("heap") {
   # This target is a logical part of the platform and only the platform target
   # should depend on it.
   visibility = [ "//third_party/WebKit/Source/platform" ]
@@ skipping 12 matching lines @@
     "GarbageCollected.h",
     "Handle.h",
     "Heap.cpp",
     "Heap.h",
     "HeapAllocator.cpp",
     "HeapAllocator.h",
     "HeapCompact.cpp",
     "HeapCompact.h",
     "HeapPage.cpp",
     "HeapPage.h",
-    "InlinedGlobalMarkingVisitor.h",
-    "MarkingVisitor.h",
-    "MarkingVisitorImpl.h",
     "Member.h",
     "PageMemory.cpp",
     "PageMemory.h",
     "PagePool.cpp",
     "PagePool.h",
     "Persistent.h",
     "PersistentNode.cpp",
     "PersistentNode.h",
     "SafePoint.cpp",
     "SafePoint.h",
     "SelfKeepAlive.h",
     "SparseHeapBitmap.cpp",
     "SparseHeapBitmap.h",
     "StackFrameDepth.cpp",
     "StackFrameDepth.h",
     "ThreadState.cpp",
     "ThreadState.h",
     "ThreadingTraits.h",
     "TraceTraits.h",
     "Visitor.cpp",
     "Visitor.h",
+    "VisitorImpl.h",
     "WrapperVisitor.h",
   ]
 
   defines = [ "BLINK_PLATFORM_IMPLEMENTATION=1" ]
 
   configs += [
     "//third_party/WebKit/Source:blink_pch",
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:non_test_config",
     "//third_party/WebKit/Source:inside_blink",
@@ skipping 35 matching lines @@
     "//third_party/WebKit/Source/wtf",
   ]
   if (is_android) {
     deps += [
       "//base:base_java",
       "//content/shell/android:content_shell_assets",
       "//net/android:net_java",
     ]
   }
 }