Move V8 snapshot loading code from isolate_holder to gin/v8_startup_data.{h,cc}.

ppapi/proxy/pdf_resource.cc

 // Copyright (c) 2013 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.
 
 #include "ppapi/proxy/pdf_resource.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
-#include "gin/public/isolate_holder.h"
+#include "gin/v8_initializer.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_pdf.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppb_image_data_proxy.h"
 #include "ppapi/shared_impl/var.h"
 #include "third_party/icu/source/i18n/unicode/usearch.h"
 
 namespace ppapi {
 namespace proxy {
 
@@ skipping 179 matching lines @@
 }
 
 void PDFResource::SetLinkUnderCursor(const char* url) {
   Post(RENDERER, PpapiHostMsg_PDF_SetLinkUnderCursor(url));
 }
 
 void PDFResource::GetV8ExternalSnapshotData(const char** natives_data_out,
                                             int* natives_size_out,
                                             const char** snapshot_data_out,
                                             int* snapshot_size_out) {
-  gin::IsolateHolder::GetV8ExternalSnapshotData(natives_data_out,
-      natives_size_out, snapshot_data_out, snapshot_size_out);
+  gin::V8Initializer::GetV8ExternalSnapshotData(
+      natives_data_out, natives_size_out, snapshot_data_out, snapshot_size_out);
 }
 
 }  // namespace proxy
 }  // namespace ppapi