Implementing WebDatabaseObserver in the renderer process....

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
===================================================================
--- chrome/common/render_messages_internal.h	(revision 29950)
+++ chrome/common/render_messages_internal.h	(working copy)
@@ -760,6 +760,13 @@
                        int32 /* the ID of the message we're replying to */,
                        int64 /* the size of the given DB file */)
 
+  // Notifies the child process of the new database size
+  IPC_MESSAGE_CONTROL4(ViewMsg_DatabaseUpdateSize,
+                       string16 /* the origin */,
+                       string16 /* the database name */,
+                       int64 /* the new database size */,
+                       int64 /* space available to origin */)
+
   // Storage events are broadcast to renderer processes.
   IPC_MESSAGE_CONTROL5(ViewMsg_DOMStorageEvent,
                        string16 /* key */,
@@ -1890,6 +1897,23 @@
                        FilePath /* the name of the file */,
                        int32 /* a unique message ID */)
 
+  // Notifies the browser process that a new database has been opened
+  IPC_MESSAGE_CONTROL4(ViewHostMsg_DatabaseOpened,
+                       string16 /* origin identifier */,
+                       string16 /* database name */,
+                       string16 /* database description */,
+                       int64 /* estimated size */)
+
+  // Notifies the browser process that a database might have been modified
+  IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseModified,
+                       string16 /* origin identifier */,
+                       string16 /* database name */)
+
+  // Notifies the browser process that a database is about to close
+  IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseClosed,
+                       string16 /* origin identifier */,
+                       string16 /* database name */)
+
   //---------------------------------------------------------------------------
   // Socket Stream messages:
   // These are messages from the SocketStreamHandle to the browser.