Restart fullscreen video playback when switching back from background

content/browser/android/content_view_core_impl.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 "content/browser/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 312 matching lines @@
 void ContentViewCoreImpl::OnHide(JNIEnv* env, jobject obj) {
   Hide();
 }
 
 void ContentViewCoreImpl::OnShow(JNIEnv* env, jobject obj) {
   Show();
 }
 
 void ContentViewCoreImpl::Show() {
   GetWebContents()->WasShown();
+  ResumeVideo();
 }
 
 void ContentViewCoreImpl::Hide() {
   GetWebContents()->WasHidden();
   PauseVideo();
 }
 
 void ContentViewCoreImpl::PauseVideo() {
   RenderViewHost* host = web_contents_->GetRenderViewHost();
   if (host)
     host->Send(new ViewMsg_PauseVideo(host->GetRoutingID()));
 }
 
+void ContentViewCoreImpl::ResumeVideo() {
+  RenderViewHost* host = web_contents_->GetRenderViewHost();
+  if (host)
+    host->Send(new ViewMsg_ResumeVideo(host->GetRoutingID()));
+}
+
 void ContentViewCoreImpl::OnTabCrashed() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
   Java_ContentViewCore_resetVSyncNotification(env, obj.obj());
 }
 
 // All positions and sizes are in CSS pixels.
 // Note that viewport_width/height is a best effort based.
@@ skipping 1283 matching lines @@
       reinterpret_cast<ui::ViewAndroid*>(view_android),
       reinterpret_cast<ui::WindowAndroid*>(window_android));
   return reinterpret_cast<intptr_t>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content