Factor DRP PreviewsState logic out of content

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 50 matching lines @@
 #include "chrome/renderer/searchbox/search_bouncer.h"
 #include "chrome/renderer/searchbox/searchbox.h"
 #include "chrome/renderer/searchbox/searchbox_extension.h"
 #include "chrome/renderer/tts_dispatcher.h"
 #include "chrome/renderer/worker_content_settings_client.h"
 #include "components/autofill/content/renderer/autofill_agent.h"
 #include "components/autofill/content/renderer/password_autofill_agent.h"
 #include "components/autofill/content/renderer/password_generation_agent.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
 #include "components/contextual_search/renderer/overlay_js_render_frame_observer.h"
+#include "components/data_reduction_proxy/content/renderer/content_previews_render_frame_observer.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h"
 #include "components/dom_distiller/content/renderer/distillability_agent.h"
 #include "components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h"
 #include "components/dom_distiller/core/dom_distiller_switches.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/error_page/common/error.h"
 #include "components/error_page/common/localized_error.h"
 #include "components/network_hints/renderer/prescient_networking_dispatcher.h"
 #include "components/password_manager/content/renderer/credential_manager_client.h"
 #include "components/pdf/renderer/pepper_pdf_host.h"
@@ skipping 524 matching lines @@
       render_frame->IsMainFrame()) {
     new SearchBox(render_frame);
   }
 
 #if BUILDFLAG(ENABLE_SPELLCHECK)
   new SpellCheckProvider(render_frame, spellcheck_.get());
 #if BUILDFLAG(HAS_SPELLCHECK_PANEL)
   new SpellCheckPanel(render_frame, registry);
 #endif  // BUILDFLAG(HAS_SPELLCHECK_PANEL)
 #endif
+
+  if (render_frame->IsMainFrame())
+    new data_reduction_proxy::ContentPreviewsRenderFrameObserver(render_frame);
 }
 
 void ChromeContentRendererClient::RenderViewCreated(
     content::RenderView* render_view) {
 #if BUILDFLAG(ENABLE_EXTENSIONS)
   ChromeExtensionsRendererClient::GetInstance()->RenderViewCreated(render_view);
 #endif
 
 #if BUILDFLAG(ENABLE_SPELLCHECK)
   // This is a workaround keeping the behavior that, the Blink side spellcheck
@@ skipping 1031 matching lines @@
   return task_scheduler_util::
       GetRendererTaskSchedulerInitParamsFromCommandLine();
 }
 
 void ChromeContentRendererClient::InitSafeBrowsingIfNecessary() {
   if (safe_browsing_)
     return;
   RenderThread::Get()->GetConnector()->BindInterface(
       content::mojom::kBrowserServiceName, &safe_browsing_);
 }