Fixed pass-by-value to pass-by-reference

chrome/renderer/chrome_render_view_observer.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 "chrome/renderer/chrome_render_view_observer.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 159 matching lines @@
 
   return true;
 }
 
 // Calculates how "boring" a thumbnail is. The boring score is the
 // 0,1 ranged percentage of pixels that are the most common
 // luma. Higher boring scores indicate that a higher percentage of a
 // bitmap are all the same brightness.
 static double CalculateBoringScore(SkBitmap* bitmap) {
   int histogram[256] = {0};
-  color_utils::BuildLumaHistogram(bitmap, histogram);
+  color_utils::BuildLumaHistogram(*bitmap, histogram);
 
   int color_count = *std::max_element(histogram, histogram + 256);
   int pixel_count = bitmap->width() * bitmap->height();
   return static_cast<double>(color_count) / pixel_count;
 }
 
 static FaviconURL::IconType ToFaviconType(WebIconURL::Type type) {
   switch (type) {
     case WebIconURL::TypeFavicon:
       return FaviconURL::FAVICON;
@@ skipping 858 matching lines @@
         reinterpret_cast<const unsigned char*>(&data[0]);
 
     return decoder.Decode(src_data, data.size());
   }
   return SkBitmap();
 }
 
 bool ChromeRenderViewObserver::IsStrictSecurityHost(const std::string& host) {
   return (strict_security_hosts_.find(host) != strict_security_hosts_.end());
 }