[Merge M50] aw: Do not destroy functor in destroy

android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java

Index: android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java
diff --git a/android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java b/android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java
index 597313b7deba46b027a806523f1e701391749c9d..c618b1a1f8918e8e0d04fc9d07d0eb3a000bbe6f 100644
--- a/android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java
+++ b/android_webview/glue/java/src/com/android/webview/chromium/DrawGLFunctor.java
@@ -16,8 +16,7 @@ import org.chromium.content.common.CleanupReference;
  * Simple Java abstraction and wrapper for the native DrawGLFunctor flow.
  * An instance of this class can be constructed, bound to a single view context (i.e. AwContennts)
  * and then drawn and detached from the view tree any number of times (using requestDrawGL and
- * detach respectively). Then when finished with, it can be explicitly released by calling
- * destroy() or will clean itself up as required via finalizer / CleanupReference.
+ * detach respectively).
  */
 class DrawGLFunctor {
     private static final String TAG = DrawGLFunctor.class.getSimpleName();
@@ -36,17 +35,6 @@ class DrawGLFunctor {
         mWebViewDelegate = webViewDelegate;
     }
 
-    public void destroy() {
-        detach();
-        if (mCleanupReference != null) {
-            mCleanupReference.cleanupNow();
-            mCleanupReference = null;
-            mDestroyRunnable = null;
-            mWebViewDelegate = null;
-            mContainerView = null;
-        }
-    }
-
     public void detach() {
         if (mWebViewDelegate != null && mContainerView != null) {
             mWebViewDelegate.detachDrawGlFunctor(mContainerView, mNativeDrawGLFunctor);