Track when fallback icon color is the default.

components/favicon_base/fallback_icon_style.cc

 // Copyright 2015 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 "components/favicon_base/fallback_icon_style.h"
 
 #include <algorithm>
 
 #include "ui/gfx/color_analysis.h"
 #include "ui/gfx/color_utils.h"
@@ skipping 16 matching lines @@
 const SkColor kDefaultTextColorDark = SK_ColorBLACK;
 const SkColor kDefaultTextColorLight = SK_ColorWHITE;
 const double kDefaultFontSizeRatio = 0.44;
 const double kDefaultRoundness = 0;  // Square. Round corners are applied
                                      // externally (Javascript or Java).
 
 }  // namespace
 
 FallbackIconStyle::FallbackIconStyle()
     : background_color(kDefaultBackgroundColor),
+      is_default_background_color(true),
       text_color(kDefaultTextColorLight),
       font_size_ratio(kDefaultFontSizeRatio),
-      roundness(kDefaultRoundness) {
-}
+      roundness(kDefaultRoundness) {}
 
 FallbackIconStyle::~FallbackIconStyle() {
 }
 
 bool FallbackIconStyle::operator==(const FallbackIconStyle& other) const {
   return background_color == other.background_color &&
-      text_color == other.text_color &&
-      font_size_ratio == other.font_size_ratio &&
-      roundness == other.roundness;
+         is_default_background_color == other.is_default_background_color &&
+         text_color == other.text_color &&
+         font_size_ratio == other.font_size_ratio &&
+         roundness == other.roundness;
 }
 
 void MatchFallbackIconTextColorAgainstBackgroundColor(
     FallbackIconStyle* style) {
   const uint8_t luma = color_utils::GetLuma(style->background_color);
   style->text_color = (luma >= kDarkTextLumaThreshold) ?
       kDefaultTextColorDark : kDefaultTextColorLight;
 }
 
 bool ValidateFallbackIconStyle(const FallbackIconStyle& style) {
@@ skipping 13 matching lines @@
       bitmap_data, lower_bound, upper_bound, &sampler);
   // |CalculateKMeanColorOfPNG| will try to return a color that lies within the
   // specified bounds if one exists in the image. If there's no such color, it
   // will return the dominant color which may be lighter than our upper bound.
   // Clamp lightness down to a reasonable maximum value so text is readable.
   color_utils::HSL color_hsl;
   color_utils::SkColorToHSL(dominant_color, &color_hsl);
   color_hsl.l = std::min(color_hsl.l, kMaxBackgroundColorLightness);
   style->background_color =
       color_utils::HSLToSkColor(color_hsl, SK_AlphaOPAQUE);
+  style->is_default_background_color = false;
 }
 
 }  // namespace favicon_base