Optimized webstorage performance

content/common/dom_storage_messages.h

Index: content/common/dom_storage_messages.h
diff --git a/content/common/dom_storage_messages.h b/content/common/dom_storage_messages.h
index 3a1affa761fb1212583b9dd20db9a956f5700726..d82710fb85e3a6b5069e9e5b9cbc0efa770013fd 100644
--- a/content/common/dom_storage_messages.h
+++ b/content/common/dom_storage_messages.h
@@ -3,6 +3,7 @@
 // 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"
@@ -84,9 +85,12 @@ IPC_SYNC_MESSAGE_CONTROL2_1(DOMStorageHostMsg_Key,
                             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,
@@ -102,6 +106,16 @@ IPC_SYNC_MESSAGE_CONTROL4_2(DOMStorageHostMsg_SetItem,
                             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 */,