Temporarily remove DCHECK that triggers during hardware teardown.

android_webview/browser/browser_view_renderer.cc

 // Copyright 2014 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 "android_webview/browser/browser_view_renderer.h"
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 361 matching lines @@
                "width",
                width,
                "height",
                height);
   attached_to_window_ = true;
   size_.SetSize(width, height);
 }
 
 void BrowserViewRenderer::OnDetachedFromWindow() {
   TRACE_EVENT0("android_webview", "BrowserViewRenderer::OnDetachedFromWindow");
+  attached_to_window_ = false;
   shared_renderer_state_.ReleaseHardwareDrawIfNeededOnUI();
-  attached_to_window_ = false;
   DCHECK(!hardware_enabled_);
 }
 
 void BrowserViewRenderer::ReleaseHardware() {
   DCHECK(hardware_enabled_);
   ReturnUnusedResource(shared_renderer_state_.PassUncommittedFrameOnUI());
   ReturnResourceFromParent();
   DCHECK(shared_renderer_state_.ReturnedResourcesEmptyOnUI());
 
   if (compositor_) {
     compositor_->ReleaseHwDraw();
   }
 
   hardware_enabled_ = false;
 }
 
 bool BrowserViewRenderer::IsVisible() const {
   // Ignore |window_visible_| if |attached_to_window_| is false.
-  return view_visible_ && (!attached_to_window_ || window_visible_);
+  return view_visible_ && attached_to_window_ && window_visible_;
 }
 
 gfx::Rect BrowserViewRenderer::GetScreenRect() const {
   return gfx::Rect(client_->GetLocationOnScreen(), size_);
 }
 
 void BrowserViewRenderer::DidInitializeCompositor(
     content::SynchronousCompositor* compositor) {
   TRACE_EVENT0("android_webview",
                "BrowserViewRenderer::DidInitializeCompositor");
@@ skipping 333 matching lines @@
   base::StringAppendF(&str,
                       "overscroll_rounding_error_: %s ",
                       overscroll_rounding_error_.ToString().c_str());
   base::StringAppendF(
       &str, "on_new_picture_enable: %d ", on_new_picture_enable_);
   base::StringAppendF(&str, "clear_view: %d ", clear_view_);
   return str;
 }
 
 }  // namespace android_webview