Add support for Animated PNG

content/browser/loader/mime_sniffing_resource_handler_unittest.cc

 // Copyright 2014 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 "content/browser/loader/mime_sniffing_resource_handler.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 623 matching lines @@
       "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,"
       "*/*;q=0.8",
       TestAcceptHeaderSetting(RESOURCE_TYPE_MAIN_FRAME));
   EXPECT_EQ(
       "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,"
       "*/*;q=0.8",
       TestAcceptHeaderSetting(RESOURCE_TYPE_SUB_FRAME));
   EXPECT_EQ("text/css,*/*;q=0.1",
             TestAcceptHeaderSetting(RESOURCE_TYPE_STYLESHEET));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_SCRIPT));
-  EXPECT_EQ("image/webp,image/*,*/*;q=0.8",
+  EXPECT_EQ("image/webp,image/apng,image/*,*/*;q=0.8",
             TestAcceptHeaderSetting(RESOURCE_TYPE_IMAGE));
-  EXPECT_EQ("image/webp,image/*,*/*;q=0.8",
+  EXPECT_EQ("image/webp,image/apng,image/*,*/*;q=0.8",
             TestAcceptHeaderSetting(RESOURCE_TYPE_FAVICON));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_FONT_RESOURCE));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_SUB_RESOURCE));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_OBJECT));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_MEDIA));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_WORKER));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_SHARED_WORKER));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_PREFETCH));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_XHR));
   EXPECT_EQ("*/*", TestAcceptHeaderSetting(RESOURCE_TYPE_PING));
@@ skipping 336 matching lines @@
   // mime sniffing is disabled and the wrapped resource handler returns false
   // on OnResponseStarted.
   EXPECT_FALSE(
       mime_sniffing_handler->OnResponseStarted(response.get(), &defer));
 
   // Process all messages to ensure proper test teardown.
   content::RunAllPendingInMessageLoop();
 }
 
 }  // namespace content