Move most importer code to chrome/utility/importer

chrome/utility/importer/favicon_reencode.cc

+// Copyright 2013 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 "chrome/utility/importer/favicon_reencode.h"
+
+#include "content/public/child/image_decoder_utils.h"
+#include "skia/ext/image_operations.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/favicon_size.h"
+
+namespace importer {
+
+bool ReencodeFavicon(const unsigned char* src_data,
+                     size_t src_len,
+                     std::vector<unsigned char>* png_data) {
+  // Decode the favicon using WebKit's image decoder.
+  SkBitmap decoded = content::DecodeImage(
+      src_data,
+      gfx::Size(gfx::kFaviconSize, gfx::kFaviconSize),
+      src_len);
+  if (decoded.empty())
+    return false;  // Unable to decode.
+
+  if (decoded.width() != gfx::kFaviconSize ||
+      decoded.height() != gfx::kFaviconSize) {
+    // The bitmap is not the correct size, re-sample.
+    int new_width = decoded.width();
+    int new_height = decoded.height();
+    gfx::CalculateFaviconTargetSize(&new_width, &new_height);
+    decoded = skia::ImageOperations::Resize(
+        decoded, skia::ImageOperations::RESIZE_LANCZOS3, new_width, new_height);
+  }
+
+  // Encode our bitmap as a PNG.
+  gfx::PNGCodec::EncodeBGRASkBitmap(decoded, false, png_data);
+  return true;
+}
+
+}  // namespace importer