Add observer classes for fileapi to observe filesystem changes

- Add common observer helper class (task_runner_bound_observer_list.h)
- Add common file observers (file_observer.h)
- Replace current quota notification impl with the observer

BUG=146290
TEST=existing tests
TEST=more tests to be added

Review URL: https://chromiumcodereview.appspot.com/10909052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155345 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 1 deletions

diff --git a/webkit/fileapi/file_system_operation_context.h b/webkit/fileapi/file_system_operation_context.h
index ae044a0..f1dbda2 100644
--- a/webkit/fileapi/file_system_operation_context.h
+++ b/webkit/fileapi/file_system_operation_context.h
@@ -9,11 +9,12 @@
 #include "base/memory/ref_counted.h"
 #include "base/sequenced_task_runner.h"
 #include "googleurl/src/gurl.h"
-#include "webkit/fileapi/fileapi_export.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_types.h"
+#include "webkit/fileapi/fileapi_export.h"
 #include "webkit/fileapi/media/media_file_system_config.h"
+#include "webkit/fileapi/task_runner_bound_observer_list.h"
 
 #if defined(SUPPORT_MEDIA_FILESYSTEM)
 #include "webkit/fileapi/media/media_device_interface_impl.h"
@@ -64,6 +65,16 @@ class FILEAPI_EXPORT_PRIVATE FileSystemOperationContext {
     return media_path_filter_;
   }
 
+  void set_access_observers(const AccessObserverList& list) {
+    access_observers_ = list;
+  }
+  AccessObserverList* access_observers() { return &access_observers_; }
+
+  void set_update_observers(const UpdateObserverList& list) {
+    update_observers_ = list;
+  }
+  UpdateObserverList* update_observers() { return &update_observers_; }
+
  private:
   scoped_refptr<FileSystemContext> file_system_context_;
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
@@ -71,6 +82,9 @@ class FILEAPI_EXPORT_PRIVATE FileSystemOperationContext {
   int64 allowed_bytes_growth_;
   MediaPathFilter* media_path_filter_;
 
+  AccessObserverList access_observers_;
+  UpdateObserverList update_observers_;
+
 #if defined(SUPPORT_MEDIA_FILESYSTEM)
   // Store the current media device.
   scoped_refptr<MediaDeviceInterfaceImpl> media_device_;