Added a call to hide the popup when the render process dies.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

 // 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.
 
 package org.chromium.content.browser;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.ContentResolver;
@@ skipping 716 matching lines @@
                     R.string.accessibility_content_view);
         }
         mContainerView.setContentDescription(contentDescription);
         mWebContentsObserver = new WebContentsObserverAndroid(this) {
             @Override
             public void didStartLoading(String url) {
                 hidePopupDialog();
                 resetScrollInProgress();
                 resetGestureDetectors();
             }
+
+            @Override
+            public void renderProcessGone(boolean wasOomProtected) {
+                hidePopupDialog();

[jdduke (slow), 2014/04/10 14:02:04]

If the ContentViewCore persists (permanently) after the renderer is destroyed,
we'll want to also call |resetScrollInProgress()| and |resetGestureDetectors()|.
 I'm not exactly sure what the relative lifetimes are...

[jdduke (slow), 2014/04/11 00:11:00]

Yeah, turns out we'll want to call both of the mentioned methods, good catch.

+            }
         };
     }
 
     @CalledByNative
     void onNativeContentViewCoreDestroyed(long nativeContentViewCore) {
         assert nativeContentViewCore == mNativeContentViewCore;
         mNativeContentViewCore = 0;
     }
 
     /**
@@ skipping 2600 matching lines @@
             boolean enableHiding, boolean enableShowing, boolean animate);
 
     private native void nativeShowImeIfNeeded(long nativeContentViewCoreImpl);
 
     private native void nativeSetAccessibilityEnabled(
             long nativeContentViewCoreImpl, boolean enabled);
 
     private native void nativeExtractSmartClipData(long nativeContentViewCoreImpl,
             int x, int y, int w, int h);
 }