Whitelist QuadF from ChromeClassTester checks

tools/clang/plugins/ChromeClassTester.cpp

 // Copyright (c) 2012 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.
 
 // A general interface for filtering and only acting on classes in Chromium C++
 // code.
 
 #include "ChromeClassTester.h"
 
 #include <sys/param.h>
@@ skipping 182 matching lines @@
   // non-pod class member. Probably harmless.
   ignored_record_names_.insert("MockTransaction");
 
   // Used heavily in ui_unittests and once in views_unittests. Fixing this
   // isn't worth the overhead of an additional library.
   ignored_record_names_.insert("TestAnimationDelegate");
 
   // Part of our public interface that nacl and friends use. (Arguably, this
   // should mean that this is a higher priority but fixing this looks hard.)
   ignored_record_names_.insert("PluginVersionInfo");
+
+  // Measured performance improvement on cc_perftests. See
+  // https://codereview.chromium.org/11299290/
+  ignored_record_names_.insert("QuadF");
 }
 
 std::string ChromeClassTester::GetNamespaceImpl(const DeclContext* context,
                                                 const std::string& candidate) {
   switch (context->getDeclKind()) {
     case Decl::TranslationUnit: {
       return candidate;
     }
     case Decl::Namespace: {
       const NamespaceDecl* decl = dyn_cast<NamespaceDecl>(context);
@@ skipping 73 matching lines @@
   PresumedLoc ploc = source_manager.getPresumedLoc(spelling_location);
   if (ploc.isInvalid()) {
     // If we're in an invalid location, we're looking at things that aren't
     // actually stated in the source.
     return false;
   }
 
   *filename = ploc.getFilename();
   return true;
 }