Use exact pixel sizes instead of dip in webapp/WebAPK installability code

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"
 
 // Selects the icon most closely matching the size constraints.  This follows
 // very basic heuristics -- improvements are welcome.
 class ManifestIconSelector {
  public:
   // Runs the algorithm to find the best matching icon in the icons listed in
   // the Manifest.
   //
   // Size is defined in Android's density-independent pixels (dp):
   // http://developer.android.com/guide/practices/screens_support.html
   // If/when this class is generalized, it may be a good idea to switch this to
   // taking in pixels, instead.
   //
-  // Any icon returned will be close as possible to |ideal_icon_size_in_dp|
-  // with a size not less than |minimum_icon_size_in_dp|.
+  // Any icon returned will be close as possible to |ideal_icon_size_in_px|
+  // with a size not less than |minimum_icon_size_in_px|.
   //
   // Returns the icon url if a suitable icon is found. An empty URL otherwise.
   static GURL FindBestMatchingIcon(
       const std::vector<content::Manifest::Icon>& icons,
-      int ideal_icon_size_in_dp,
-      int minimum_icon_size_in_dp);
-
-  static int ConvertIconSizeFromDpToPx(int icon_size_in_dp);
+      int ideal_icon_size_in_px,
+      int minimum_icon_size_in_px);
 
  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(
@@ skipping 24 matching lines @@
 
   const int ideal_icon_size_in_px_;
   const int minimum_icon_size_in_px_;
 
   friend class ManifestIconSelectorTest;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestIconSelector);
 };
 
 #endif  // CHROME_BROWSER_MANIFEST_MANIFEST_ICON_SELECTOR_H_