[Icons NTP] Refactoring: Moving FallbackIconService to components\favicon\core

components/favicon_base/fallback_icon_service.cc

Index: components/favicon_base/fallback_icon_service.cc
diff --git a/components/favicon_base/fallback_icon_service.cc b/components/favicon_base/fallback_icon_service.cc
deleted file mode 100644
index adce72e105f6a1fce671c62fb27dabcecfb0ef87..0000000000000000000000000000000000000000
--- a/components/favicon_base/fallback_icon_service.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// 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_service.h"
-
-#include <algorithm>
-
-#include "base/i18n/case_conversion.h"
-#include "base/strings/utf_string_conversions.h"
-#include "components/favicon_base/fallback_icon_style.h"
-#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
-#include "third_party/skia/include/core/SkPaint.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/codec/png_codec.h"
-#include "ui/gfx/font_list.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-#include "url/gurl.h"
-
-namespace favicon_base {
-
-namespace {
-
-// Arbitrary maximum icon size, can be reasonably increased if needed.
-const int kMaxFallbackFaviconSize = 288;
-
-// Returns a single character to represent a page URL. To do this we take the
-// first letter in a domain's name and make it upper case.
-// TODO(huangs): Handle non-ASCII ("xn--") domain names.
-base::string16 GetFallbackIconText(const GURL& url) {
-  std::string domain = net::registry_controlled_domains::GetDomainAndRegistry(
-        url, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
-  return domain.empty() ? base::string16() :
-      base::i18n::ToUpper(base::ASCIIToUTF16(domain.substr(0, 1)));
-}
-
-}  // namespace
-
-FallbackIconService::FallbackIconService(
-    const std::vector<std::string>& font_list)
-  : font_list_(font_list) {
-}
-
-FallbackIconService::~FallbackIconService() {
-}
-
-std::vector<unsigned char> FallbackIconService::RenderFallbackIconBitmap(
-    const GURL& icon_url,
-    int size,
-    const FallbackIconStyle& style) {
-  int size_to_use = std::min(kMaxFallbackFaviconSize, size);
-  gfx::Canvas canvas(gfx::Size(size_to_use, size_to_use), 1.0f, false);
-  DrawFallbackIcon(icon_url, size_to_use, style, &canvas);
-
-  std::vector<unsigned char> bitmap_data;
-  if (!gfx::PNGCodec::EncodeBGRASkBitmap(canvas.ExtractImageRep().sk_bitmap(),
-                                         false, &bitmap_data)) {
-    bitmap_data.clear();
-  }
-  return bitmap_data;
-}
-
-void FallbackIconService::DrawFallbackIcon(const GURL& icon_url,
-                                           int size,
-                                           const FallbackIconStyle& style,
-                                           gfx::Canvas* canvas) {
-  const int kOffsetX = 0;
-  const int kOffsetY = 0;
-  SkPaint paint;
-  paint.setStyle(SkPaint::kFill_Style);
-  paint.setAntiAlias(true);
-
-  // Draw a filled, colored rounded square.
-  paint.setColor(style.background_color);
-  int corner_radius = static_cast<int>(size * style.roundness * 0.5 + 0.5);
-  canvas->DrawRoundRect(
-      gfx::Rect(kOffsetX, kOffsetY, size, size), corner_radius, paint);
-
-  // Draw text.
-  base::string16 icon_text = GetFallbackIconText(icon_url);
-  if (icon_text.empty())
-    return;
-  int font_size = static_cast<int>(size * style.font_size_ratio);
-  if (font_size <= 0)
-    return;
-
-  // TODO(huangs): See how expensive gfx::FontList() is, and possibly cache.
-  canvas->DrawStringRectWithFlags(
-      icon_text,
-      gfx::FontList(font_list_, gfx::Font::NORMAL, font_size),
-      style.text_color,
-      gfx::Rect(kOffsetX, kOffsetY, size, size),
-      gfx::Canvas::TEXT_ALIGN_CENTER);
-}
-
-}  // namespace favicon_base