DevTools: retain DTAH in all the targets to match their life time.

chrome/browser/android/tab_android.cc

 // Copyright 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/browser/android/tab_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 47 matching lines @@
 #include "components/navigation_interception/intercept_navigation_delegate.h"
 #include "components/navigation_interception/navigation_params.h"
 #include "components/offline_pages/core/offline_page_feature.h"
 #include "components/offline_pages/core/offline_page_item.h"
 #include "components/offline_pages/core/offline_page_model.h"
 #include "components/sessions/content/content_live_tab.h"
 #include "components/sessions/core/tab_restore_service.h"
 #include "components/url_formatter/url_fixer.h"
 #include "content/public/browser/android/compositor.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/browser_controls_state.h"
 #include "content/public/common/resource_request_body.h"
 #include "jni/Tab_jni.h"
@@ skipping 712 matching lines @@
   if (tab_content_manager == tab_content_manager_)
     return;
 
   if (tab_content_manager_)
     tab_content_manager_->DetachLiveLayer(GetAndroidId(), GetContentLayer());
   tab_content_manager_ = tab_content_manager;
   if (tab_content_manager_)
     tab_content_manager_->AttachLiveLayer(GetAndroidId(), GetContentLayer());
 }
 
+scoped_refptr<content::DevToolsAgentHost> TabAndroid::GetDevToolsAgentHost() {
+  return devtools_host_;
+}
+
+void TabAndroid::SetDevToolsAgentHost(
+    scoped_refptr<content::DevToolsAgentHost> host) {
+  devtools_host_ = host;

[Bernhard Bauer, 2017/04/24 12:16:57]

std::move(host)?

+}
+
 static void Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TRACE_EVENT0("native", "TabAndroid::Init");
   // This will automatically bind to the Java object and pass ownership there.
   new TabAndroid(env, obj);
 }
 
 // static
 bool TabAndroid::RegisterTabAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }