[Editing][CodeHealth] remove default argument 'host' in EditingTestBase::setShadowContent

Source/core/editing/EditingStrategyTest.cpp

 // 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 "config.h"
 
 #include "core/editing/EditingStrategy.h"
 
 #include "core/editing/EditingTestBase.h"
 
 namespace blink {
 
 class EditingStrategyTest : public EditingTestBase {
 };
 
 TEST_F(EditingStrategyTest, caretMaxOffset)
 {
     const char* bodyContent = "<p id='host'>00<b id='one'>1</b><b id='two'>22</b>333</p>";
     const char* shadowContent = "<content select=#two></content><content select=#one></content>";
     setBodyContent(bodyContent);
-    setShadowContent(shadowContent);
+    setShadowContent(shadowContent, "host");
     Node* host = document().getElementById("host");
     Node* one = document().getElementById("one");
     Node* two = document().getElementById("two");
 
     EXPECT_EQ(4, EditingStrategy::caretMaxOffset(*host));
     EXPECT_EQ(1, EditingStrategy::caretMaxOffset(*one));
     EXPECT_EQ(1, EditingStrategy::caretMaxOffset(*one->firstChild()));
     EXPECT_EQ(2, EditingStrategy::caretMaxOffset(*two->firstChild()));
 
     EXPECT_EQ(2, EditingInComposedTreeStrategy::caretMaxOffset(*host));
     EXPECT_EQ(1, EditingInComposedTreeStrategy::caretMaxOffset(*one));
     EXPECT_EQ(1, EditingInComposedTreeStrategy::caretMaxOffset(*one->firstChild()));
     EXPECT_EQ(2, EditingInComposedTreeStrategy::caretMaxOffset(*two->firstChild()));
 }
 
 } // namespace blink