Disk cache: Stop evictions while performing final cleanup....

net/disk_cache/eviction.h

Index: net/disk_cache/eviction.h
===================================================================
--- net/disk_cache/eviction.h	(revision 52555)
+++ net/disk_cache/eviction.h	(working copy)
@@ -20,10 +20,13 @@
 // integrated with BackendImpl.
 class Eviction {
  public:
-  Eviction() : backend_(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {}
+  Eviction()
+      : backend_(NULL), init_(false),
+        ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {}
   ~Eviction() {}
 
   void Init(BackendImpl* backend);
+  void Stop();
 
   // Deletes entries from the cache until the current size is below the limit.
   // If empty is true, the whole cache will be trimmed, regardless of being in
@@ -73,6 +76,7 @@
   bool first_trim_;
   bool trimming_;
   bool delay_trim_;
+  bool init_;
   ScopedRunnableMethodFactory<Eviction> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Eviction);