[BlobAsync] Moving async handling into BlobStorageContext & quota out.

storage/browser/blob/blob_memory_controller.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef STORAGE_BROWSER_BLOB_BLOB_MEMORY_CONTROLLER_H_
 #define STORAGE_BROWSER_BLOB_BLOB_MEMORY_CONTROLLER_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 27 matching lines @@
 class ShareableBlobDataItem;
 class ShareableFileReference;
 
 // This class's main responsibility is deciding how blob data gets stored.
 // This encompasses:
 // * Keeping track of memory & file quota,
 // * How to transport the blob data from the renderer (DetermineStrategy),
 // * Allocating memory & file quota (ReserveMemoryQuota, ReserveFileQuota)
 // * Paging memory quota to disk when we're nearing our memory limit, and
 // * Maintaining an LRU of memory items to choose candidates to page to disk
-//   (NotifyMemoryItemUsed).
+//   (NotifyMemoryItemsUsed).
 // This class can only be interacted with on the IO thread.
 class STORAGE_EXPORT BlobMemoryController {
  public:
   enum class Strategy {
     // We don't have enough memory for this blob.
     TOO_LARGE,
     // There isn't any memory that needs transporting.
     NONE_NEEDED,
     // Transportation strategies.
     IPC,
@@ skipping 86 matching lines @@
   // |done_callback|.
   // Returns a task handle for cancellation.
   // NOTE: We don't inspect quota limits and assume the user checked
   //       CanReserveQuota before calling this.
   base::WeakPtr<QuotaAllocationTask> ReserveFileQuota(
       std::vector<scoped_refptr<ShareableBlobDataItem>> unreserved_file_items,
       const FileQuotaRequestCallback& done_callback);
 
   // Called when initially populated or upon later access.
   void NotifyMemoryItemsUsed(
-      std::vector<scoped_refptr<ShareableBlobDataItem>>& items);
+      const std::vector<scoped_refptr<ShareableBlobDataItem>>& items);
 
   size_t memory_usage() const { return blob_memory_used_; }
   uint64_t disk_usage() const { return disk_used_; }
 
   const BlobStorageLimits& limits() const { return limits_; }
   void set_limits_for_testing(const BlobStorageLimits& limits) {
     limits_ = limits;
   }
 
  private:
@@ skipping 77 matching lines @@
   // another blob successfully grabs a ref, we can prevent it from adding the
   // item to the recent_item_cache_ above.
   std::unordered_set<uint64_t> items_paging_to_file_;
 
   base::WeakPtrFactory<BlobMemoryController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobMemoryController);
 };
 }  // namespace storage
 #endif  // STORAGE_BROWSER_BLOB_BLOB_MEMORY_CONTROLLER_H_