[CacheStorage] Clean up CacheStorageCache lifetimes

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
diff --git a/content/browser/renderer_host/render_message_filter.h b/content/browser/renderer_host/render_message_filter.h
index d27bb692611a3c9392e07ab85d97c1cd147ce766..d776baaab79b4c93adc8793cda037cefbde34b2a 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -134,6 +134,7 @@ class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {
                            const bool use_prompt) const;
 
  private:
+  using CacheID = int32_t;
   friend class BrowserThread;
   friend class base::DeleteHelper<RenderMessageFilter>;
 
@@ -226,6 +227,7 @@ class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {
                                   int buf_len,
                                   scoped_refptr<CacheStorageCache> cache,
                                   CacheStorageError error);
+  void DidWriteSideData(CacheID cache_id, CacheStorageError error);
   void OnKeygen(uint32_t key_size_index,
                 const std::string& challenge_string,
                 const GURL& url,
@@ -277,6 +279,9 @@ class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {
   MediaInternals* media_internals_;
   CacheStorageContextImpl* cache_storage_context_;
 
+  CacheID next_cache_id_;
+  std::map<CacheID, scoped_refptr<CacheStorageCache>> cache_references_;
+
   base::WeakPtrFactory<RenderMessageFilter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderMessageFilter);