Upstream oodles of Chrome for Android code into Chromium.

chrome/browser/android/tab/background_content_view_helper.h

+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_ANDROID_TAB_BACKGROUND_CONTENT_VIEW_HELPER_H_
+#define CHROME_BROWSER_ANDROID_TAB_BACKGROUND_CONTENT_VIEW_HELPER_H_
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_weak_ref.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/layers/layer.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace chrome {
+namespace android {
+class ChromeWebContentsDelegateAndroid;
+}
+}
+
+class BackgroundContentViewHelper {
+ public:
+  static BackgroundContentViewHelper* FromJavaObject(JNIEnv* env,
+                                                     jobject jobj);
+  static bool Register(JNIEnv* env);
+
+  BackgroundContentViewHelper();
+  virtual ~BackgroundContentViewHelper();
+
+  void Destroy(JNIEnv* env, jobject jobj);
+  void SetWebContents(JNIEnv* env,
+                      jobject jobj,
+                      jobject jcontent_view_core,
+                      jobject jweb_contents_delegate);
+  void DestroyWebContents(JNIEnv* env, jobject jobj);
+  void ReleaseWebContents(JNIEnv* env, jobject jobj);
+  void MergeHistoryFrom(JNIEnv* env, jobject jobj, jobject jweb_contents);
+  // Calls 'unload' handler and destroys the web_contents passed in.
+  void UnloadAndDeleteWebContents(JNIEnv* env,
+                                  jobject jobj,
+                                  jobject jweb_contents);
+  int GetSwapTimeoutMs(JNIEnv* env, jobject obj);
+  int GetNumFramesNeededForSwap(JNIEnv* env, jobject obj);
+
+ private:
+  scoped_refptr<cc::Layer> GetContentLayer();
+
+  scoped_ptr<content::WebContents> web_contents_;
+  scoped_ptr<chrome::android::ChromeWebContentsDelegateAndroid>
+      web_contents_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundContentViewHelper);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_TAB_BACKGROUND_CONTENT_VIEW_HELPER_H_