Use initialized canvas to create network icons.

ui/gfx/canvas.h

 // 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.
 
 #ifndef UI_GFX_CANVAS_H_
 #define UI_GFX_CANVAS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 64 matching lines @@
   };
 
   // Creates an empty canvas with image_scale of 1x.
   Canvas();
 
   // Creates canvas with provided DIP |size| and |image_scale|.
   // If this canvas is not opaque, it's explicitly cleared to transparent before
   // being returned.
   Canvas(const Size& size, float image_scale, bool is_opaque);
 
-  // Constructs a canvas with the size and the image_scale of the provided
-  // |image_rep|, and draws the |image_rep| into it.
-  Canvas(const ImageSkiaRep& image_rep, bool is_opaque);
-
   // Creates a Canvas backed by an |sk_canvas| with |image_scale_|.
   // |sk_canvas| is assumed to be already scaled based on |image_scale|
   // so no additional scaling is applied.
   Canvas(sk_sp<SkCanvas> sk_canvas, float image_scale);
 
   virtual ~Canvas();
 
   // Recreates the backing platform canvas with DIP |size| and |image_scale_|.
   // If the canvas is not opaque, it is explicitly cleared.
   // This method is public so that canvas_skia_paint can recreate the platform
@@ skipping 351 matching lines @@
   float image_scale_;
 
   sk_sp<SkCanvas> canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_H_