testing

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

Index: third_party/WebKit/Source/core/fetch/MemoryCache.cpp
diff --git a/third_party/WebKit/Source/core/fetch/MemoryCache.cpp b/third_party/WebKit/Source/core/fetch/MemoryCache.cpp
index 9e179a922cc0e68183c4297864aa79eafdd4e9eb..4d04fd525939cb42f7435e8fe9d083d3949bd759 100644
--- a/third_party/WebKit/Source/core/fetch/MemoryCache.cpp
+++ b/third_party/WebKit/Source/core/fetch/MemoryCache.cpp
@@ -54,6 +54,12 @@ MemoryCache* memoryCache()
     return gMemoryCache->get();
 }
 
+void shutdownCache()
+{
+    *gMemoryCache = nullptr;

[haraken, 2015/10/14 00:49:01]

I now realized that this approach won't work... (I should have noticed it
eariler, sorry :-)

One renderer process can be shared among multiple tabs. This means that
gMemoryCache is per-process, not per-tab. Also WebKit::shutdown() can be called
multiple times. If we clear the gMemoryCache in WebKit::shutdown(), it can crash
tabs running on the same renderer process.

+    delete gMemoryCache;
+}
+
 MemoryCache* replaceMemoryCacheForTesting(MemoryCache* cache)
 {
 #if ENABLE(OILPAN)