Added lifecycle management and sharing support for SharedWorkers. SharedWorkers

chrome/common/render_messages_internal.h

   // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 1727 matching lines @@
   // A renderer sends this to the browser process when it wants to create a
   // worker.  The browser will create the worker process if necessary, and
   // will return the route id on success.  On error returns MSG_ROUTING_NONE.
   IPC_SYNC_MESSAGE_CONTROL4_1(ViewHostMsg_CreateWorker,
                               GURL /* url */,
                               bool /* is_shared */,
                               string16 /* name */,
                               int /* render_view_route_id */,
                               int /* route_id */)
 
+  // This message is sent to the browser to see if an instance of this shared
+  // worker already exists (returns route_id != MSG_ROUTING_NONE). This route
+  // id can be used to forward messages to the worker via ForwardToWorker. If a
+  // non-empty name is passed, also validates that the url matches the url of
+  // the existing worker. If a matching worker is found, the passed-in
+  // document_id is associated with that worker, to ensure that the worker
+  // stays alive until the document is detached.
+  IPC_SYNC_MESSAGE_CONTROL3_2(ViewHostMsg_LookupSharedWorker,
+                              GURL /* url */,
+                              string16 /* name */,
+                              unsigned long long /* document_id */,
+                              int /* route_id */,
+                              bool /* url_mismatch */)
+
+  // A renderer sends this to the browser process when a document has been
+  // detached. The browser will use this to constrain the lifecycle of worker
+  // processes (SharedWorkers are shut down when their last associated document
+  // is detached).
+  IPC_MESSAGE_CONTROL1(ViewHostMsg_DocumentDetached,
+                       unsigned long long /* document_id */)
+
   // A message sent to the browser on behalf of a renderer which wants to show
   // a desktop notification.
   IPC_MESSAGE_ROUTED3(ViewHostMsg_ShowDesktopNotification,
                       GURL /* origin */,
                       GURL /* contents_url */,
                       int /* notification_id */)
   IPC_MESSAGE_ROUTED5(ViewHostMsg_ShowDesktopNotificationText,
                       GURL /* origin */,
                       GURL /* icon_url */,
                       string16 /* title */,
@@ skipping 254 matching lines @@
                               std::string /* signed public key and challenge */)
 
 #if defined(SPELLCHECKER_IN_RENDERER)
   // The renderer has tried to spell check a word, but couldn't because no
   // dictionary was available to load. Request that the browser find an
   // appropriate dictionary and return it.
   IPC_MESSAGE_CONTROL0(ViewHostMsg_SpellChecker_RequestDictionary)
 #endif
 
 IPC_END_MESSAGES(ViewHost)