Experiment: Release static Oilpan heap singletons prior to LSan leak detection.

third_party/WebKit/Source/core/fetch/Resource.cpp

Index: third_party/WebKit/Source/core/fetch/Resource.cpp
diff --git a/third_party/WebKit/Source/core/fetch/Resource.cpp b/third_party/WebKit/Source/core/fetch/Resource.cpp
index 368115033a61d62a55f36cd99abab659a685076d..37cd2e89d8444e1e6f70882ad57b77581f854cff 100644
--- a/third_party/WebKit/Source/core/fetch/Resource.cpp
+++ b/third_party/WebKit/Source/core/fetch/Resource.cpp
@@ -41,6 +41,7 @@
 #include "public/platform/Platform.h"
 #include "public/platform/WebProcessMemoryDump.h"
 #include "wtf/CurrentTime.h"
+#include "wtf/LeakAnnotations.h"
 #include "wtf/MathExtras.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/Vector.h"
@@ -997,7 +998,13 @@ ResourcePriority Resource::priorityFromClients()
 
 Resource::ResourceCallback* Resource::ResourceCallback::callbackHandler()
 {
-    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ResourceCallback>, callbackHandler, (adoptPtrWillBeNoop(new ResourceCallback)));
+    // Oilpan + LSan: as the callbackHandler() singleton is used by Resource
+    // and ResourcePtr finalizers, it cannot be released upon shutdown in
+    // preparation for leak detection.
+    //
+    // Keep it out of LSan's reach instead.
+    WTF_ANNOTATE_SCOPED_MEMORY_LEAK;
+    DEFINE_STATIC_LOCAL_NO_REGISTER(OwnPtrWillBePersistent<ResourceCallback>, callbackHandler, (adoptPtrWillBeNoop(new ResourceCallback)));
     return callbackHandler.get();
 }