Register clipboard image blob in the browser process to copy data less.

content/common/clipboard_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, so no include guard.
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
@@ skipping 50 matching lines @@
                             base::string16 /* result */)
 IPC_SYNC_MESSAGE_CONTROL1_4(ClipboardHostMsg_ReadHTML,
                             ui::ClipboardType /* type */,
                             base::string16 /* markup */,
                             GURL /* url */,
                             uint32_t /* fragment start */,
                             uint32_t /* fragment end */)
 IPC_SYNC_MESSAGE_CONTROL1_1(ClipboardHostMsg_ReadRTF,
                             ui::ClipboardType /* type */,
                             std::string /* result */)
-IPC_SYNC_MESSAGE_CONTROL1_2(ClipboardHostMsg_ReadImage,
+IPC_SYNC_MESSAGE_CONTROL1_3(ClipboardHostMsg_ReadImage,
                             ui::ClipboardType /* type */,
-                            base::SharedMemoryHandle /* PNG-encoded image */,
-                            uint32_t /* image size */)
+                            std::string /* blob_uuid */,
+                            std::string /* mime_type */,
+                            int64_t /* size */);
 IPC_SYNC_MESSAGE_CONTROL2_1(ClipboardHostMsg_ReadCustomData,
                             ui::ClipboardType /* type */,
                             base::string16 /* type */,
                             base::string16 /* result */)
 
 // Writing to the clipboard via IPC is a two-phase operation. First, the sender
 // sends the different types of data it'd like to write to the receiver. Then,
 // it sends a commit message to commit the data to the system clipboard.
 IPC_MESSAGE_CONTROL2(ClipboardHostMsg_WriteText,
                      ui::ClipboardType /* type */,
@@ skipping 18 matching lines @@
 IPC_SYNC_MESSAGE_CONTROL3_0(ClipboardHostMsg_WriteImage,
                             ui::ClipboardType /* type */,
                             gfx::Size /* size */,
                             base::SharedMemoryHandle /* bitmap handle */)
 IPC_MESSAGE_CONTROL1(ClipboardHostMsg_CommitWrite, ui::ClipboardType /* type */)
 
 #if defined(OS_MACOSX)
 IPC_MESSAGE_CONTROL1(ClipboardHostMsg_FindPboardWriteStringAsync,
                      base::string16 /* text */)
 #endif