Improve IndexedDB's quota support

content/browser/in_process_webkit/indexed_db_context.h

Index: content/browser/in_process_webkit/indexed_db_context.h
diff --git a/content/browser/in_process_webkit/indexed_db_context.h b/content/browser/in_process_webkit/indexed_db_context.h
index 408cccc737a15a2a863092a8093bbbcdeeb3e9a9..1f5c232b559a5d6218de09543a55dfe4c87a259f 100644
--- a/content/browser/in_process_webkit/indexed_db_context.h
+++ b/content/browser/in_process_webkit/indexed_db_context.h
@@ -12,6 +12,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/browser_thread.h"
 
+#include <map>
+
 class GURL;
 class FilePath;
 class WebKitContext;
@@ -56,14 +58,29 @@ class IndexedDBContext : public base::RefCountedThreadSafe<IndexedDBContext> {
   // Deletes a single indexed db file.
   void DeleteIndexedDBFile(const FilePath& file_path);
 
-  // Deletes all indexed db files for the given origin.
+  // Deletes all indexed db files for the given origin.  Only works for
+  // extensions, not any origin.
   void DeleteIndexedDBForOrigin(const string16& origin_id);
 
+  // TODO(dgrogan): Once we can delete IndexedDB directories out from
+  // underneath open webkit instances, merge this and DeleteIndexedDBForOrigin.
+  void EvictOrigin(const GURL& origin_url);
+
   // Does a particular origin get unlimited storage?
   bool IsUnlimitedStorageGranted(const GURL& origin) const;
 
   void GetAllOriginIdentifiers(std::vector<string16>* origin_ids);
 
+  void NewConnection(const GURL& origin_url);
+  void TransactionComplete(const GURL& origin_url);
+  void ConnectionClosed(const GURL& origin_url);
+  int64 InitializeDiskUsage(const GURL& origin_url);
+  void GotUpdatedQuota(const GURL& origin_url, int64 usage, int64 quota);
+  bool WouldBeOverQuota(const GURL& origin_url, int64 additional_bytes);
+  bool IsOverQuota(const GURL& origin_url);
+
+  void QueryDiskAndUpdateQuotaUsage(const GURL& origin_url);
+
   quota::QuotaManagerProxy* quota_manager_proxy();
 
 #ifdef UNIT_TEST
@@ -85,6 +102,15 @@ class IndexedDBContext : public base::RefCountedThreadSafe<IndexedDBContext> {
   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBContext);
+
+  typedef std::map<GURL, int64> OriginToSizeMap;
+  OriginToSizeMap origin_size_map_;
+  OriginToSizeMap origin_allocated_quota_map_;
+
+  std::map<GURL, unsigned int> connection_count_;
+
+  int64 ReadUsageFromDisk(const GURL& origin_url) const;
+  void QueryAvailableQuota(const GURL& origin_url);
 };
 
 #endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CONTEXT_H_