[Android] Decouple pausing video from RenderView pause.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index d2c3dd3c3738c631953c950f49b9a625f2214920..1f51615065645b7db2174164a1adaf5daa9cf4d6 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -342,6 +342,13 @@ void ContentViewCoreImpl::Show() {
 
 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::OnTabCrashed() {