aw: Fix hardware init/tear down in pop up flow

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index 4027eeb6f03e0be49cedb37df7613dcd9b411231..900ac95dc4a8369e683e72c1a188924d851a5aa0 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -621,16 +621,17 @@ public class AwContents {
         if (wasWindowFocused) onWindowFocusChanged(false);
         if (wasViewVisible) setViewVisibilityInternal(false);
         if (wasWindowVisible) setWindowVisibilityInternal(false);
+        if (wasAttached) onDetachedFromWindow();
         if (!wasPaused) onPause();
-        // Not calling onDetachedFromWindow here because native code requires GL context to release
-        // GL resources. This case is properly handled when destroy is called while still attached
-        // to window.
 
         setNewAwContents(popupNativeAwContents);
 
         // Finally refresh all view state for mContentViewCore and mNativeAwContents.
         if (!wasPaused) onResume();
-        if (wasAttached) onAttachedToWindow();
+        if (wasAttached) {
+            onAttachedToWindow();
+            postInvalidateOnAnimation();
+        }
         onSizeChanged(mContainerView.getWidth(), mContainerView.getHeight(), 0, 0);
         if (wasWindowVisible) setWindowVisibilityInternal(true);
         if (wasViewVisible) setViewVisibilityInternal(true);