Avoid updating frame info while detached from activity

content/browser/android/content_view_core_impl.cc

 // 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.
 
 #include "content/browser/android/content_view_core_impl.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 404 matching lines @@
     const gfx::Vector2dF& scroll_offset,
     float page_scale_factor,
     const gfx::Vector2dF& page_scale_factor_limits,
     const gfx::SizeF& content_size,
     const gfx::SizeF& viewport_size,
     const gfx::Vector2dF& controls_offset,
     const gfx::Vector2dF& content_offset,
     bool is_mobile_optimized_hint) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
+  if (obj.is_null() || !window_android_)
     return;
 
   window_android_->set_content_offset(
       gfx::ScaleVector2d(content_offset, dpi_scale_));
 
   page_scale_ = page_scale_factor;
 
   Java_ContentViewCore_updateFrameInfo(
       env, obj.obj(),
       scroll_offset.x(),
@@ skipping 1103 matching lines @@
     return ScopedJavaLocalRef<jobject>();
 
   return view->GetJavaObject();
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content