Flash video doesn't play if opened in background tab

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index a05111f2d7507dc6f6c8af26c4139dafa3cd06fc..1b767fb454834a9564df35a0b5dd68a4684fc88d 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -764,17 +764,19 @@ class WebContentsViewAura::WindowObserver
   // going to be deprecated in a year, this is ok for now. The test for this is
   // PrintPreviewTest.WindowedNPAPIPluginHidden.
   virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE {
-    if (new_window == view_->window_)
-      return;
-
-    if (new_window == parent_)
-      return;  // This happens if the parent moves to the root window.
+    if (new_window != view_->window_) {
+      // Skip the case when the parent moves to the root window.
+      if (new_window != parent_) {
+        // Observe sibling windows of the WebContents, or children of the root
+        // window.
+        if (new_window->parent() == parent_ ||
+            new_window->parent() == view_->window_->GetRootWindow()) {
+          new_window->AddObserver(this);
+        }
+      }
+    }
 
-    // Observe sibling windows of the WebContents, or children of the root
-    // window.
-    if (new_window->parent() == parent_ ||
-        new_window->parent() == view_->window_->GetRootWindow()) {
-      new_window->AddObserver(this);
+    if (new_window->parent() == parent_) {
       UpdateConstrainedWindows(NULL);
     }
   }