IndexedDB: Fixed support for empty blobs.

content/public/browser/indexed_db_context.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_INDEXED_DB_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_INDEXED_DB_CONTEXT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 12 matching lines @@
 // Represents the per-BrowserContext IndexedDB data.
 // Call these methods only via the exposed TaskRunner.
 class IndexedDBContext : public base::RefCountedThreadSafe<IndexedDBContext> {
  public:
   // Only call the below methods by posting to this TaskRunner.
   virtual base::SequencedTaskRunner* TaskRunner() const = 0;
 
   // Methods used in response to QuotaManager requests.
   virtual std::vector<IndexedDBInfo> GetAllOriginsInfo() = 0;
   virtual int64 GetOriginDiskUsage(const GURL& origin_url) = 0;
+  virtual int GetOriginBlobFileCount(const GURL& origin_url) = 0;
 
   // Deletes all indexed db files for the given origin.
   virtual void DeleteForOrigin(const GURL& origin_url) = 0;
 
   // Copies the indexed db files from this context to another. The
   // indexed db directory in the destination context needs to be empty.
   virtual void CopyOriginData(const GURL& origin_url,
                               IndexedDBContext* dest_context) = 0;
 
   // Get the file name of the local storage file for the given origin.
   virtual base::FilePath GetFilePathForTesting(
       const std::string& origin_id) const = 0;
   // Set the task runner for tests if browser main loop is not initialized.
   virtual void SetTaskRunnerForTesting(
       base::SequencedTaskRunner* task_runner) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<IndexedDBContext>;
   virtual ~IndexedDBContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_INDEXED_DB_CONTEXT_H_