Revert of [blink] Unique pointers in Platform.h

chrome/renderer/chrome_content_renderer_client.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.
 
 #include "chrome/renderer/chrome_content_renderer_client.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1249 matching lines @@
 #if BUILDFLAG(ENABLE_PLUGINS) && BUILDFLAG(ENABLE_EXTENSIONS)
 bool ChromeContentRendererClient::IsExtensionOrSharedModuleWhitelisted(
     const GURL& url, const std::set<std::string>& whitelist) {
   const extensions::ExtensionSet* extension_set =
       extensions::RendererExtensionRegistry::Get()->GetMainThreadExtensionSet();
   return chrome::IsExtensionOrSharedModuleWhitelisted(url, extension_set,
       whitelist);
 }
 #endif
 
-std::unique_ptr<blink::WebSpeechSynthesizer>
+blink::WebSpeechSynthesizer*
 ChromeContentRendererClient::OverrideSpeechSynthesizer(
     blink::WebSpeechSynthesizerClient* client) {
-  return base::MakeUnique<TtsDispatcher>(client);
+  return new TtsDispatcher(client);
 }
 
 bool ChromeContentRendererClient::AllowPepperMediaStreamAPI(
     const GURL& url) {
 #if defined(OS_ANDROID)
   return false;
 #else
   // Allow access for tests.
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnablePepperTesting)) {
@@ skipping 267 matching lines @@
 
   RecordYouTubeRewriteUMA(result);
   return corrected_url.ReplaceComponents(r);
 }
 
 std::unique_ptr<base::TaskScheduler::InitParams>
 ChromeContentRendererClient::GetTaskSchedulerInitParams() {
   return task_scheduler_util::
       GetRendererTaskSchedulerInitParamsFromCommandLine();
 }