Support WebSQLDatabases in incognito mode.

webkit/database/database_tracker.h

Index: webkit/database/database_tracker.h
===================================================================
--- webkit/database/database_tracker.h	(revision 49482)
+++ webkit/database/database_tracker.h	(working copy)
@@ -10,6 +10,7 @@
 
 #include "base/file_path.h"
 #include "base/observer_list.h"
+#include "base/platform_file.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/string16.h"
@@ -100,7 +101,7 @@
     virtual ~Observer() {}
   };
 
-  explicit DatabaseTracker(const FilePath& profile_path);
+  DatabaseTracker(const FilePath& profile_path, bool is_incognito);
 
   void DatabaseOpened(const string16& origin_identifier,
                       const string16& database_name,
@@ -156,6 +157,18 @@
   int DeleteDataForOrigin(const string16& origin_identifier,
                           net::CompletionCallback* callback);
 
+  bool IsIncognitoProfile() const { return is_incognito_; }
+
+  void GetIncognitoFileHandle(const string16& vfs_file_path,
+                              base::PlatformFile* file_handle) const;
+  void SaveIncognitoFileHandle(const string16& vfs_file_path,
+                               const base::PlatformFile& file_handle);
+  bool CloseIncognitoFileHandle(const string16& vfs_file_path);
+  bool HasSavedIncognitoFileHandle(const string16& vfs_file_path) const;
+
+  // Deletes the directory that stores all DBs in incognito mode, if it exists.
+  void DeleteIncognitoDBDirectory();
+
   static void ClearLocalState(const FilePath& profile_path);
 
  private:
@@ -164,6 +177,8 @@
 
   typedef std::map<string16, std::set<string16> > DatabaseSet;
   typedef std::map<net::CompletionCallback*, DatabaseSet> PendingCompletionMap;
+  typedef std::map<string16, base::PlatformFile> FileHandlesMap;
+  typedef std::map<string16, string16> OriginDirectoriesMap;
 
   class CachedOriginInfo : public OriginInfo {
    public:
@@ -216,8 +231,13 @@
   void ScheduleDatabasesForDeletion(const DatabaseSet& databases,
                                     net::CompletionCallback* callback);
 
+  // Returns the directory where all DB files for the given origin are stored.
+  string16 GetOriginDirectory(const string16& origin_identifier);
+
   bool is_initialized_;
   const bool is_incognito_;
+  bool shutting_down_;
+  const FilePath profile_path_;
   const FilePath db_dir_;
   scoped_ptr<sql::Connection> db_;
   scoped_ptr<DatabasesTable> databases_table_;
@@ -238,8 +258,21 @@
   // to quota_table_ every time an extention is loaded.
   std::map<string16, int64> in_memory_quotas_;
 
-  FRIEND_TEST(DatabaseTrackerTest, DatabaseTracker);
-  FRIEND_TEST(DatabaseTrackerTest, NoInitIncognito);
+  // When in incognito mode, store a DELETE_ON_CLOSE handle to each
+  // main DB and journal file that was accessed. When the incognito profile
+  // goes away (or when the browser crashes), all these handles will be
+  // closed, and the files will be deleted.
+  FileHandlesMap incognito_file_handles_;
+
+  // In a non-incognito profile, all DBs in an origin are stored in a directory
+  // named after the origin. In an incognito profile though, we do not want the
+  // directory structure to reveal the origins visited by the user (in case the
+  // browser process crashes and those directories are not deleted). So we use
+  // this map to assign directory names that do not reveal this information.
+  OriginDirectoriesMap incognito_origin_directories_;
+  int incognito_origin_directories_generator_;
+
+  FRIEND_TEST(DatabaseTracker, TestHelper);
 };
 
 }  // namespace webkit_database