Remove WebUI favicon support on iOS

ios/web/webui/crw_web_ui_manager_unittest.mm

 // 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.
 
 #import "ios/web/webui/crw_web_ui_manager.h"
 
 #include <memory>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 131 matching lines @@
 // Tests that CRWWebUIManager observes provisional navigation and invokes an
 // HTML load in web state.
 TEST_F(CRWWebUIManagerTest, LoadWebUI) {
   base::string16 html(base::SysNSStringToUTF16(kHtml));
   GURL url(kTestWebUIUrl);
   EXPECT_CALL(*web_state_impl_, LoadWebUIHtml(html, url));
   web_state_impl_->OnProvisionalNavigationStarted(url);
 }
 
 // Tests that CRWWebUIManager responds to OnScriptCommandReceieved call and runs
-// JavaScript to set favicon background.
-TEST_F(CRWWebUIManagerTest, HandleFaviconRequest) {
-  GURL test_url(kTestWebUIUrl);
-  std::string favicon_url_string(kFaviconUrl);
-
-  // Create mock JavaScript message to request favicon.
-  base::ListValue* arguments(new base::ListValue());
-  arguments->AppendString(favicon_url_string);
-  std::unique_ptr<base::DictionaryValue> message(new base::DictionaryValue());
-  message->SetString("message", "webui.requestFavicon");
-  message->Set("arguments", arguments);
-
-  // Create expected JavaScript to call.
-  base::FilePath favicon_path;
-  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &favicon_path));
-  favicon_path = favicon_path.AppendASCII(kFaviconPath);
-  NSData* expected_data = [NSData
-      dataWithContentsOfFile:base::SysUTF8ToNSString(favicon_path.value())];
-  base::string16 expected_javascript = base::SysNSStringToUTF16([NSString
-      stringWithFormat:
-          @"chrome.setFaviconBackground('%s', 'data:image/png;base64,%@');",
-          favicon_url_string.c_str(),
-          [expected_data base64EncodedStringWithOptions:0]]);
-
-  EXPECT_CALL(*web_state_impl_, ExecuteJavaScript(expected_javascript));
-  web_state_impl_->OnScriptCommandReceived("webui.requestFavicon", *message,
-                                           test_url, false);
-}
-
-// Tests that CRWWebUIManager responds to OnScriptCommandReceieved call and runs
 // JavaScript to fetch a mojo resource.
 TEST_F(CRWWebUIManagerTest, HandleLoadMojoRequest) {
   // Create mock JavaScript message to request a mojo resource.
   std::unique_ptr<base::ListValue> arguments(new base::ListValue());
   arguments->AppendString(kMojoModuleName);
   const char kTestLoadId[] = "test-load-id";
   arguments->AppendString(kTestLoadId);
   base::DictionaryValue message;
   message.SetString("message", "webui.loadMojo");
   message.Set("arguments", std::move(arguments));
 
   // Create expected JavaScript to call.
   std::string expected_javascript = base::StringPrintf(
       "%s__crWeb.webUIModuleLoadNotifier.moduleLoadCompleted(\"%s\", \"%s\");",
       base::SysNSStringToUTF8(kMojoModule).c_str(), kMojoModuleName,
       kTestLoadId);
 
   EXPECT_CALL(*web_state_impl_,
               ExecuteJavaScript(base::UTF8ToUTF16(expected_javascript)));
   web_state_impl_->OnScriptCommandReceived("webui.loadMojo", message,
                                            GURL(kTestWebUIUrl), false);
 }
 }  // namespace web