[oilpan] Add verification build time flag

Adds build infra for a new heap verification mode that
can be enabled with the gn arg:
  enable_blink_heap_verificaton = true

Bug: chromium:757440
Change-Id: I77d6ca4064b51c672b00267d21c4b5cf1f0998c6
Reviewed-on: https://chromium-review.googlesource.com/941222Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539933}

third_party/WebKit/Source/platform/BUILD.gn

@@ -208,7 +208,7 @@ group("blink_platform_public_deps") {
     "//services/service_manager/public/mojom:mojom_blink",
     "//skia",
     "//third_party:jpeg",
-    "//third_party/WebKit/Source/platform/heap:blink_heap_incremental_marking",
+    "//third_party/WebKit/Source/platform/heap:blink_heap_flags",
     "//third_party/WebKit/Source/platform/network:make_generated",
     "//third_party/WebKit/Source/platform/wtf",
     "//third_party/WebKit/common:blink_common",

third_party/WebKit/Source/platform/heap/BUILD.gn

@@ -10,15 +10,18 @@ import("//testing/test.gni")
 declare_args() {
   # Enables incremental marking in Oilpan.
   enable_blink_heap_incremental_marking = false
-}
 
-buildflag_header("blink_heap_incremental_marking") {
-  header = "IncrementalMarkingFlag.h"
+  # Enables heap verification.
+  enable_blink_heap_verification = false
+}
 
+buildflag_header("blink_heap_flags") {
+  header = "HeapFlags.h"
   header_dir = "blink/platform/heap"
 
   flags = [
     "BLINK_HEAP_INCREMENTAL_MARKING=$enable_blink_heap_incremental_marking",
+    "BLINK_HEAP_VERIFICATION=$enable_blink_heap_verification",
   ]
 }
 

third_party/WebKit/Source/platform/heap/HeapAllocator.h

@@ -7,7 +7,7 @@
 
 #include "build/build_config.h"
 #include "platform/heap/Heap.h"
-#include "platform/heap/IncrementalMarkingFlag.h"
+#include "platform/heap/HeapFlags.h"
 #include "platform/heap/Persistent.h"
 #include "platform/heap/TraceTraits.h"
 #include "platform/wtf/Allocator.h"

third_party/WebKit/Source/platform/heap/IncrementalMarkingTest.cpp

@@ -9,9 +9,9 @@
 #include "platform/heap/GarbageCollected.h"
 #include "platform/heap/Heap.h"
 #include "platform/heap/HeapAllocator.h"
+#include "platform/heap/HeapFlags.h"
 #include "platform/heap/HeapTerminatedArray.h"
 #include "platform/heap/HeapTerminatedArrayBuilder.h"
-#include "platform/heap/IncrementalMarkingFlag.h"
 #include "platform/heap/Member.h"
 #include "platform/heap/ThreadState.h"
 #include "platform/heap/TraceTraits.h"

third_party/WebKit/Source/platform/heap/Member.h

@@ -6,8 +6,8 @@
 #define Member_h
 
 #include "platform/heap/Heap.h"
+#include "platform/heap/HeapFlags.h"
 #include "platform/heap/HeapPage.h"
-#include "platform/heap/IncrementalMarkingFlag.h"
 #include "platform/wtf/Allocator.h"
 #include "platform/wtf/HashFunctions.h"
 #include "platform/wtf/HashTraits.h"

third_party/WebKit/Source/platform/heap/ThreadState.cpp

@@ -46,7 +46,7 @@
 #include "platform/heap/Handle.h"
 #include "platform/heap/Heap.h"
 #include "platform/heap/HeapCompact.h"
-#include "platform/heap/IncrementalMarkingFlag.h"
+#include "platform/heap/HeapFlags.h"
 #include "platform/heap/PagePool.h"
 #include "platform/heap/SafePoint.h"
 #include "platform/heap/Visitor.h"