clang plugin: Remove follow-macro-expansion toggle

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 <algorithm>
@@ skipping 179 matching lines @@
       return true;
     if (HasIgnoredBases(base_record))
       return true;
   }
   return false;
 }
 
 bool ChromeClassTester::InImplementationFile(SourceLocation record_location) {
   std::string filename;
 
-  if (options_.follow_macro_expansion) {
-    // If |record_location| is a macro, check the whole chain of expansions.
-    const SourceManager& source_manager = instance_.getSourceManager();
-    while (true) {
-      if (GetFilename(record_location, &filename)) {
-        if (ends_with(filename, ".cc") || ends_with(filename, ".cpp") ||
-            ends_with(filename, ".mm")) {
-          return true;
-        }
+  // If |record_location| is a macro, check the whole chain of expansions.
+  const SourceManager& source_manager = instance_.getSourceManager();
+  while (true) {
+    if (GetFilename(record_location, &filename)) {
+      if (ends_with(filename, ".cc") || ends_with(filename, ".cpp") ||
+          ends_with(filename, ".mm")) {
+        return true;
       }
-      if (!record_location.isMacroID()) {
-        break;
-      }
-      record_location =
-          source_manager.getImmediateExpansionRange(record_location).first;
     }
-  } else {
-    if (!GetFilename(record_location, &filename))
-      return false;
-
-    if (ends_with(filename, ".cc") || ends_with(filename, ".cpp") ||
-        ends_with(filename, ".mm")) {
-      return true;
+    if (!record_location.isMacroID()) {
+      break;
     }
+    record_location =
+        source_manager.getImmediateExpansionRange(record_location).first;
   }
 
   return false;
 }
 
 void ChromeClassTester::BuildBannedLists() {
   banned_namespaces_.emplace("std");
   banned_namespaces_.emplace("__gnu_cxx");
 
   if (options_.enforce_in_thirdparty_webkit) {
@@ skipping 103 matching lines @@
   }
 
   *filename = ploc.getFilename();
   return true;
 }
 
 DiagnosticsEngine::Level ChromeClassTester::getErrorLevel() {
   return diagnostic().getWarningsAsErrors() ? DiagnosticsEngine::Error
                                             : DiagnosticsEngine::Warning;
 }