Remove support for the web manifest icon density member.

chrome/browser/manifest/manifest_icon_selector.h

 // 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.
 
 #ifndef CHROME_BROWSER_MANIFEST_MANIFEST_ICON_SELECTOR_H_
 #define CHROME_BROWSER_MANIFEST_MANIFEST_ICON_SELECTOR_H_
 
 #include "base/macros.h"
 #include "content/public/common/manifest.h"
 #include "url/gurl.h"
@@ skipping 31 matching lines @@
       int ideal_icon_size_in_dp,
       int minimum_icon_size_in_dp);
 
   static int ConvertIconSizeFromDpToPx(int icon_size_in_dp);
 
  private:
   ManifestIconSelector(int ideal_icon_size_in_px,
                        int minimum_icon_size_in_px);
   virtual ~ManifestIconSelector() {}
 
+  // Returns the square icon that is the smallest icon larger than
+  // ideal_icon_size_in_px_ (if it exists), or the largest icon smaller than
+  // ideal_icon_size_in_px_ otherwise.
+  int FindClosestIconToIdealSize(
+      const std::vector<content::Manifest::Icon>& icons) const;
+
   // Runs the algorithm to find the best matching icon in the icons listed in
   // the Manifest.
   // Returns the icon url if a suitable icon is found. An empty URL otherwise.
-  int FindBestMatchingIcon(const std::vector<content::Manifest::Icon>& icons);
-
-  // Runs an algorithm only based on icon declared sizes. It will try to find
-  // size that is the closest to preferred_icon_size_in_pixels_ but bigger than
-  // preferred_icon_size_in_pixels_ if possible.
-  // Returns the index of a suitable icon if one is found. -1 otherwise.
-  int FindBestMatchingIconForDensity(
-      const std::vector<content::Manifest::Icon>& icons,
-      float density);
+  int FindBestMatchingIcon(
+      const std::vector<content::Manifest::Icon>& icons) const;
 
   // Returns whether the |preferred_icon_size_in_pixels_| is in |sizes|.
-  bool IconSizesContainsPreferredSize(const std::vector<gfx::Size>& sizes);
+  bool IconSizesContainsPreferredSize(
+      const std::vector<gfx::Size>& sizes) const;
 
   // Returns whether a size bigger than |minimun_icon_size_in_pixels_| is in
   // |sizes|.
   bool IconSizesContainsBiggerThanMinimumSize(
-      const std::vector<gfx::Size>& sizes);
+      const std::vector<gfx::Size>& sizes) const;
 
   // Returns an array containing the items in |icons| without the unsupported
   // image MIME types.
   static std::vector<content::Manifest::Icon> FilterIconsByType(
       const std::vector<content::Manifest::Icon>& icons);
 
   // Returns whether the 'any' (ie. gfx::Size(0,0)) is in |sizes|.
   static bool IconSizesContainsAny(const std::vector<gfx::Size>& sizes);
 
   const int ideal_icon_size_in_px_;
   const int minimum_icon_size_in_px_;
-  const float density_;
 
   friend class ManifestIconSelectorTest;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestIconSelector);
 };
 
 #endif  // CHROME_BROWSER_MANIFEST_MANIFEST_ICON_SELECTOR_H_