BuildLumaHistogram  707 chrome/browser/thumbnails/content_analysis_unittest.cc   color_utils::BuildLumaHistogram(result, histogram);
BuildLumaHistogram   66 chrome/browser/thumbnails/simple_thumbnail_crop.cc   color_utils::BuildLumaHistogram(bitmap, histogram);
BuildLumaHistogram   50 ui/gfx/color_utils.h GFX_EXPORT void BuildLumaHistogram(const SkBitmap& bitmap, int histogram[256]);