[BlobStorage] Enabling disk paging and direct storage.

storage/browser/blob/blob_memory_controller.h

Index: storage/browser/blob/blob_memory_controller.h
diff --git a/storage/browser/blob/blob_memory_controller.h b/storage/browser/blob/blob_memory_controller.h
index 865d3e01ab580a460364d62375a136ff24e54aa8..14f031697fb229e652c5207e1401d68a5bd4f28a 100644
--- a/storage/browser/blob/blob_memory_controller.h
+++ b/storage/browser/blob/blob_memory_controller.h
@@ -16,7 +16,7 @@
 #include <utility>
 #include <vector>
 
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "base/callback_helpers.h"
 #include "base/containers/mru_cache.h"
 #include "base/files/file.h"
@@ -157,8 +157,14 @@ class STORAGE_EXPORT BlobMemoryController {
   size_t memory_usage() const { return blob_memory_used_; }
   uint64_t disk_usage() const { return disk_used_; }
 
+  // Schedules a task on the file runner to calculate blob storage quota limits.
+  void CalculateBlobStorageLimits();
+
+  base::WeakPtr<BlobMemoryController> GetWeakPtr();
+
   const BlobStorageLimits& limits() const { return limits_; }
   void set_limits_for_testing(const BlobStorageLimits& limits) {
+    manual_limits_set_ = true;
     limits_ = limits;
   }
 
@@ -171,6 +177,10 @@ class STORAGE_EXPORT BlobMemoryController {
   using PendingFileQuotaTaskList =
       std::list<std::unique_ptr<FileQuotaAllocationTask>>;
 
+  void OnStorageLimitsCalculated(BlobStorageLimits limits);
+
+  void FreezeDiskUsage(uint64_t avail_disk_space);
+
   base::WeakPtr<QuotaAllocationTask> AppendMemoryTask(
       uint64_t total_bytes_needed,
       std::vector<scoped_refptr<ShareableBlobDataItem>> unreserved_memory_items,
@@ -190,7 +200,7 @@ class STORAGE_EXPORT BlobMemoryController {
       scoped_refptr<ShareableFileReference> file_reference,
       std::vector<scoped_refptr<ShareableBlobDataItem>> items,
       size_t total_items_size,
-      FileCreationInfo result);
+      std::pair<FileCreationInfo, int64_t> result);
 
   size_t GetAvailableMemoryForBlobs() const;
   uint64_t GetAvailableFileSpaceForBlobs() const;
@@ -210,6 +220,9 @@ class STORAGE_EXPORT BlobMemoryController {
   // changes.
   void RecordTracingCounters() const;
 
+  // Store that we set manual limits so we don't accidentally override them with
+  // our configuration task.
+  bool manual_limits_set_ = false;
   BlobStorageLimits limits_;
 
   // Memory bookkeeping. These numbers are all disjoint.