Optimized webstorage performance

content/common/dom_storage_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message file, no traditional include guard.
+#include "base/shared_memory.h"
 #include "content/public/common/common_param_traits.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageArea.h"
 #include "webkit/dom_storage/dom_storage_types.h"
 
 #define IPC_MESSAGE_START DOMStorageMsgStart
 
 // Signals a local storage event.
@@ skipping 61 matching lines @@
                             int /* connection_id */,
                             unsigned /* length */)
 
 // Get a the ith key within a storage area.
 IPC_SYNC_MESSAGE_CONTROL2_1(DOMStorageHostMsg_Key,
                             int /* connection_id */,
                             unsigned /* index */,
                             NullableString16 /* key */)
 
 // Get a value based on a key from a storage area.
-IPC_SYNC_MESSAGE_CONTROL2_1(DOMStorageHostMsg_GetItem,
+IPC_SYNC_MESSAGE_CONTROL2_4(DOMStorageHostMsg_GetItem,
                             int /* connection_id */,
                             string16 /* key */,
+                            int /*IPC mode flag*/,
+                            base::SharedMemoryHandle /*shm handle*/,
+                            unsigned /* value length*/,
                             NullableString16 /* value */)
 
 // TODO(michaeln): after the old sync IPC message have been deleted,
 // rename the Async ones to no longer have the Async suffix.
 
 // Set a value that's associated with a key in a storage area.
 IPC_SYNC_MESSAGE_CONTROL4_2(DOMStorageHostMsg_SetItem,
                             int /* connection_id */,
                             string16 /* key */,
                             string16 /* value */,
                             GURL /* page_url */,
                             WebKit::WebStorageArea::Result /* result */,
                             NullableString16 /* old_value */)
 
 // Set a value that's associated with a key in a storage area.
+IPC_SYNC_MESSAGE_CONTROL5_2(DOMStorageHostMsg_SetItemOpt,
+                            int /* connection_id */,
+                            string16 /* key */,
+                            int /*value length*/,
+                            base::SharedMemoryHandle /* value */,
+                            GURL /* page_url */,
+                            WebKit::WebStorageArea::Result /* result */,
+                            NullableString16 /* old_value */)
+
+// Set a value that's associated with a key in a storage area.
 // A completion notification is sent in response.
 IPC_MESSAGE_CONTROL5(DOMStorageHostMsg_SetItemAsync,
                      int /* connection_id */,
                      int /* operation_id */,
                      string16 /* key */,
                      string16 /* value */,
                      GURL /* page_url */)
 
 // Remove the value associated with a key in a storage area.
 IPC_SYNC_MESSAGE_CONTROL3_1(DOMStorageHostMsg_RemoveItem,
@@ skipping 14 matching lines @@
 IPC_SYNC_MESSAGE_CONTROL2_1(DOMStorageHostMsg_Clear,
                             int /* connection_id */,
                             GURL /* page_url */,
                             bool /* something_cleared */)
 
 // Clear the storage area. A completion notification is sent in response.
 IPC_MESSAGE_CONTROL3(DOMStorageHostMsg_ClearAsync,
                      int /* connection_id */,
                      int /* operation_id */,
                      GURL /* page_url */)