IDBObserver: Lifetime Management: Adding Observer

third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h

Index: third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLContextEvent.idl b/third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h
similarity index 85%
copy from third_party/WebKit/Source/modules/webgl/WebGLContextEvent.idl
copy to third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h
index 484b8bcbc8cc164db18fcc791f782fd8e9fb1fe7..4318e7f1b06d2c17dbc9d86d4104fffe3a3d1411 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLContextEvent.idl
+++ b/third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h
@@ -23,11 +23,17 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// https://www.khronos.org/registry/webgl/specs/1.0/#5.15
+#ifndef WebIDBObserver_h
+#define WebIDBObserver_h
 
-[
-    Constructor(DOMString type, optional WebGLContextEventInit eventInit),
-] interface WebGLContextEvent : Event {
-    readonly attribute DOMString statusMessage;
+namespace blink {
+
+class WebIDBObserver {
+public:
+    virtual ~WebIDBObserver() {}
+    virtual void removeObserver(int32_t id) = 0;
 };
 
+} // namespace blink
+
+#endif // WebIDBObserver_h