Remove unused chrome://large-icon

chrome/browser/ui/webui/large_icon_source.cc

-// 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 "chrome/browser/ui/webui/large_icon_source.h"
-
-#include <vector>
-
-#include "base/memory/ref_counted_memory.h"
-#include "chrome/browser/search/instant_io_context.h"
-#include "chrome/common/url_constants.h"
-#include "components/favicon/core/large_icon_service.h"
-#include "components/favicon_base/fallback_icon_style.h"
-#include "components/favicon_base/favicon_types.h"
-#include "components/favicon_base/large_icon_url_parser.h"
-#include "net/url_request/url_request.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "ui/gfx/codec/png_codec.h"
-
-namespace {
-
-const int kMaxLargeIconSize = 192;  // Arbitrary bound to safeguard endpoint.
-
-}  // namespace
-
-LargeIconSource::LargeIconSource(favicon::LargeIconService* large_icon_service)
-    : large_icon_service_(large_icon_service) {}
-
-LargeIconSource::~LargeIconSource() {
-}
-
-std::string LargeIconSource::GetSource() const {
-  return chrome::kChromeUILargeIconHost;
-}
-
-void LargeIconSource::StartDataRequest(
-    const std::string& path,
-    const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
-    const content::URLDataSource::GotDataCallback& callback) {
-  if (!large_icon_service_) {
-    SendNotFoundResponse(callback);
-    return;
-  }
-
-  LargeIconUrlParser parser;
-  bool success = parser.Parse(path);
-  if (!success ||
-      parser.size_in_pixels() <= 0 ||
-      parser.size_in_pixels() > kMaxLargeIconSize) {
-    SendNotFoundResponse(callback);
-    return;
-  }
-
-  GURL url(parser.url_string());
-  if (!url.is_valid()) {
-    SendNotFoundResponse(callback);
-    return;
-  }
-
-  // TODO(beaudoin): Potentially allow icon to be scaled up.
-  large_icon_service_->GetLargeIconOrFallbackStyle(
-      url,
-      parser.size_in_pixels(),  // Reducing this will enable scale up.
-      parser.size_in_pixels(),
-      base::Bind(&LargeIconSource::OnLargeIconDataAvailable,
-                 base::Unretained(this), callback, url,
-                 parser.size_in_pixels()),
-      &cancelable_task_tracker_);
-}
-
-std::string LargeIconSource::GetMimeType(const std::string&) const {
-  // We need to explicitly return a mime type, otherwise if the user tries to
-  // drag the image they get no extension.
-  return "image/png";
-}
-
-bool LargeIconSource::AllowCaching() const {
-  return false;
-}
-
-bool LargeIconSource::ShouldReplaceExistingSource() const {
-  // Leave the existing DataSource in place, otherwise we'll drop any pending
-  // requests on the floor.
-  return false;
-}
-
-bool LargeIconSource::ShouldServiceRequest(
-    const GURL& url,
-    content::ResourceContext* resource_context,
-    int render_process_id) const {
-  if (url.SchemeIs(chrome::kChromeSearchScheme)) {
-    return InstantIOContext::ShouldServiceRequest(url, resource_context,
-                                                  render_process_id);
-  }
-  return URLDataSource::ShouldServiceRequest(url, resource_context,
-                                             render_process_id);
-}
-
-void LargeIconSource::OnLargeIconDataAvailable(
-    const content::URLDataSource::GotDataCallback& callback,
-    const GURL& url,
-    int size,
-    const favicon_base::LargeIconResult& result) {
-  if (result.bitmap.is_valid()) {
-    callback.Run(result.bitmap.bitmap_data.get());
-    return;
-  }
-
-  if (!result.fallback_icon_style) {
-    SendNotFoundResponse(callback);
-    return;
-  }
-
-  // RenderFallbackIconBitmap() cannot draw fallback icons on Android. See
-  // crbug.com/580922 for details. Return a 1x1 bitmap so that JavaScript can
-  // detect that it needs to generate a fallback icon.
-  SkBitmap bitmap;
-  bitmap.allocN32Pixels(1, 1);
-  bitmap.eraseColor(result.fallback_icon_style->background_color);
-  std::vector<unsigned char> bitmap_data;
-  if (!gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bitmap_data))
-    bitmap_data.clear();
-
-  callback.Run(base::RefCountedBytes::TakeVector(&bitmap_data));
-}
-
-void LargeIconSource::SendNotFoundResponse(
-    const content::URLDataSource::GotDataCallback& callback) {
-  callback.Run(nullptr);
-}