Delete unused chrome://fallback-icon/ handling

chrome/browser/ui/webui/fallback_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/fallback_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/fallback_icon_service.h"
-#include "components/favicon_base/fallback_icon_url_parser.h"
-#include "components/keyed_service/core/service_access_type.h"
-#include "net/url_request/url_request.h"
-#include "ui/gfx/favicon_size.h"
-#include "url/gurl.h"
-
-FallbackIconSource::FallbackIconSource(
-    favicon::FallbackIconService* fallback_icon_service)
-    : fallback_icon_service_(fallback_icon_service) {
-}
-
-FallbackIconSource::~FallbackIconSource() {
-}
-
-std::string FallbackIconSource::GetSource() const {
-  return chrome::kChromeUIFallbackIconHost;
-}
-
-void FallbackIconSource::StartDataRequest(
-    const std::string& path,
-    const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
-    const content::URLDataSource::GotDataCallback& callback) {
-  chrome::ParsedFallbackIconPath parsed;
-  bool success = parsed.Parse(path);
-  if (!success) {
-    SendDefaultResponse(callback);
-    return;
-  }
-
-  GURL url(parsed.url_string());
-  if (url.is_empty() || !url.is_valid()) {
-    SendDefaultResponse(callback);
-    return;
-  }
-
-  SendFallbackIconHelper(
-      url, parsed.size_in_pixels(), parsed.style(), callback);
-}
-
-std::string FallbackIconSource::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 FallbackIconSource::AllowCaching() const {
-  return false;
-}
-
-bool FallbackIconSource::ShouldReplaceExistingSource() const {
-  // Leave the existing DataSource in place, otherwise we'll drop any pending
-  // requests on the floor.
-  return false;
-}
-
-bool FallbackIconSource::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 FallbackIconSource::SendFallbackIconHelper(
-    const GURL& url,
-    int size_in_pixels,
-    const favicon_base::FallbackIconStyle& style,
-    const content::URLDataSource::GotDataCallback& callback) {
-  if (!fallback_icon_service_) {  // Can be null for tests.
-    callback.Run(nullptr);  // Trigger "Not Found" response.
-    return;
-  }
-  std::vector<unsigned char> bitmap_data =
-      fallback_icon_service_->RenderFallbackIconBitmap(
-          url, size_in_pixels, style);
-  callback.Run(base::RefCountedBytes::TakeVector(&bitmap_data));
-}
-
-void FallbackIconSource::SendDefaultResponse(
-    const content::URLDataSource::GotDataCallback& callback) {
-  favicon_base::FallbackIconStyle default_style;
-  SendFallbackIconHelper(GURL(), gfx::kFaviconSize, default_style, callback);
-}