Factor out RenderWidgetHostConnector

content/browser/android/render_process_connector.cc

+// Copyright 2017 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 "content/browser/android/render_process_connector.h"
+
+#include "content/browser/frame_host/interstitial_page_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_android.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+
+namespace content {
+
+RenderProcessConnector::RenderProcessConnector(WebContents* web_contents)
+    : WebContentsObserver(web_contents), rwhva_(nullptr) {}
+
+RenderProcessConnector::~RenderProcessConnector() {}
+
+RenderWidgetHostViewAndroid*
+RenderProcessConnector::GetRenderWidgetHostViewAndroid() const {
+  RenderWidgetHostView* rwhv = web_contents()->GetRenderWidgetHostView();
+  WebContentsImpl* web_contents_impl =
+      static_cast<WebContentsImpl*>(web_contents());
+  if (web_contents_impl->ShowingInterstitialPage()) {
+    rwhv = web_contents_impl->GetInterstitialPage()
+               ->GetMainFrame()
+               ->GetRenderViewHost()
+               ->GetWidget()
+               ->GetView();
+  }
+  return static_cast<RenderWidgetHostViewAndroid*>(rwhv);
+}
+
+void RenderProcessConnector::RenderViewReady() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderProcessConnector::RenderViewHostChanged(RenderViewHost* old_host,
+                                                   RenderViewHost* new_host) {
+  if (new_host) {
+    UpdateRenderWidgetHostView(static_cast<RenderWidgetHostViewAndroid*>(
+        new_host->GetWidget()->GetView()));
+  } else {
+    UpdateRenderWidgetHostView(nullptr);
+  }
+}
+
+void RenderProcessConnector::DidAttachInterstitialPage() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderProcessConnector::DidDetachInterstitialPage() {
+  UpdateRenderWidgetHostView(GetRenderWidgetHostViewAndroid());
+}
+
+void RenderProcessConnector::WebContentsDestroyed() {
+  delete this;
+}
+
+void RenderProcessConnector::UpdateRenderWidgetHostView(
+    RenderWidgetHostViewAndroid* new_rwhva) {
+  if (rwhva_.get() == new_rwhva)
+    return;
+
+  UpdateRenderProcessConnection(rwhva_.get(), new_rwhva);
+  if (new_rwhva)
+    rwhva_ = new_rwhva->GetWeakPtrAndroid();
+  else
+    rwhva_.reset();
+}
+
+}  // namespace content