clang plugin: Remove follow-macro-expansion toggle

tools/clang/plugins/ChromeClassTester.cpp

Index: tools/clang/plugins/ChromeClassTester.cpp
diff --git a/tools/clang/plugins/ChromeClassTester.cpp b/tools/clang/plugins/ChromeClassTester.cpp
index 08e0d40d0a94ac5d985ab0e30c497fc02c85c548..e8f1507447b92f39dfd8caa63a67ea744242df1d 100644
--- a/tools/clang/plugins/ChromeClassTester.cpp
+++ b/tools/clang/plugins/ChromeClassTester.cpp
@@ -197,30 +197,20 @@ bool ChromeClassTester::HasIgnoredBases(const CXXRecordDecl* record) {
 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.isMacroID()) {
-        break;
+  // 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;
       }
-      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;