Android: Don't evict thumbnails for last visible tab on stop

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 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/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 801 matching lines @@
   host_->SetBackgroundOpaque(GetBackgroundOpaque());
   UpdateBackgroundColor(color);
 }
 
 void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const ReadbackRequestCallback& callback,
     const SkColorType preferred_color_type) {
   TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::CopyFromCompositingSurface");
-  if (!host_ || host_->is_hidden() || !IsSurfaceAvailableForCopy()) {
+  if (!host_ || !IsSurfaceAvailableForCopy()) {
     callback.Run(SkBitmap(), READBACK_SURFACE_UNAVAILABLE);
     return;
   }
   if (!content_view_core_ || !(content_view_core_->GetWindowAndroid())) {
     callback.Run(SkBitmap(), READBACK_FAILED);
     return;
   }
 
   base::TimeTicks start_time = base::TimeTicks::Now();
   const display::Display& display =
@@ skipping 1029 matching lines @@
     case ui::MotionEvent::ACTION_UP:
     case ui::MotionEvent::ACTION_POINTER_UP:
       UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.OS.TOUCH_RELEASED",
                                   delta.InMicroseconds(), 1, 1000000, 50);
     default:
       return;
   }
 }
 
 }  // namespace content