Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

chrome/browser/thumbnails/simple_thumbnail_crop.cc

 // Copyright (c) 2013 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 "chrome/browser/thumbnails/simple_thumbnail_crop.h"
 
 #include "base/metrics/histogram.h"
 #include "content/public/browser/browser_thread.h"
 #include "skia/ext/platform_canvas.h"
 #include "ui/gfx/color_utils.h"
@@ skipping 37 matching lines @@
       bitmap,
       ComputeTargetSizeAtMaximumScale(target_size_),
       &context->clip_result);
 
   context->score.boring_score = CalculateBoringScore(thumbnail);
   context->score.good_clipping =
       (context->clip_result == CLIP_RESULT_WIDER_THAN_TALL ||
        context->clip_result == CLIP_RESULT_TALLER_THAN_WIDE ||
        context->clip_result == CLIP_RESULT_NOT_CLIPPED);
 
-  callback.Run(*context, thumbnail);
+  callback.Run(*context.get(), thumbnail);
 }
 
 double SimpleThumbnailCrop::CalculateBoringScore(const SkBitmap& bitmap) {
   if (bitmap.isNull() || bitmap.empty())
     return 1.0;
   int histogram[256] = {0};
   color_utils::BuildLumaHistogram(bitmap, histogram);
 
   int color_count = *std::max_element(histogram, histogram + 256);
   int pixel_count = bitmap.width() * bitmap.height();
@@ skipping 169 matching lines @@
       clipped_bitmap.height() == result.height())
     clipped_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config);
 #endif
 
   HISTOGRAM_TIMES(kThumbnailHistogramName,
                   base::TimeTicks::Now() - begin_compute_thumbnail);
   return result;
 }
 
 }