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

content/renderer/renderer_clipboard_delegate.cc

 // 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.
 
 // This file provides the embedder's side of the Clipboard interface.
 
 #include "content/renderer/renderer_clipboard_delegate.h"
 
 #include "base/memory/shared_memory.h"
 #include "base/numerics/safe_math.h"
@@ skipping 51 matching lines @@
   RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadHTML(
       type, markup, url, fragment_start, fragment_end));
 }
 
 void RendererClipboardDelegate::ReadRTF(ui::ClipboardType type,
                                         std::string* result) {
   RenderThreadImpl::current()->Send(new ClipboardHostMsg_ReadRTF(type, result));
 }
 
 void RendererClipboardDelegate::ReadImage(ui::ClipboardType type,
-                                          std::string* data) {
-  base::SharedMemoryHandle image_handle;
-  uint32_t image_size = 0;
+                                          std::string* blob_uuid,
+                                          std::string* mime_type,
+                                          int64_t* size) {
   RenderThreadImpl::current()->Send(
-      new ClipboardHostMsg_ReadImage(type, &image_handle, &image_size));
-  if (base::SharedMemory::IsHandleValid(image_handle)) {
-    base::SharedMemory buffer(image_handle, true);
-    buffer.Map(image_size);
-    data->append(static_cast<char*>(buffer.memory()), image_size);
-  }
+      new ClipboardHostMsg_ReadImage(type, blob_uuid, mime_type, size));
 }
 
 void RendererClipboardDelegate::ReadCustomData(ui::ClipboardType clipboard_type,
                                                const base::string16& type,
                                                base::string16* data) {
   RenderThreadImpl::current()->Send(
       new ClipboardHostMsg_ReadCustomData(clipboard_type, type, data));
 }
 
 void RendererClipboardDelegate::WriteText(ui::ClipboardType clipboard_type,
@@ skipping 66 matching lines @@
       clipboard_type, size, shared_buf->handle()));
   return true;
 }
 
 void RendererClipboardDelegate::CommitWrite(ui::ClipboardType clipboard_type) {
   RenderThreadImpl::current()->Send(
       new ClipboardHostMsg_CommitWrite(clipboard_type));
 }
 
 }  // namespace content