clang style plugin: Don't try to figure out src root.

tools/clang/plugins/ChromeClassTester.h

 // Copyright (c) 2011 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.
 
 #ifndef TOOLS_CLANG_PLUGINS_CHROMECLASSTESTER_H_
 #define TOOLS_CLANG_PLUGINS_CHROMECLASSTESTER_H_
 
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/AST.h"
 #include "clang/AST/TypeLoc.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Frontend/CompilerInstance.h"
 
 #include <set>
 #include <vector>
 
 // A class on top of ASTConsumer that forwards classes defined in Chromium
 // headers to subclasses which implement CheckChromeClass().
 class ChromeClassTester : public clang::ASTConsumer {
  public:
   explicit ChromeClassTester(clang::CompilerInstance& instance);
   virtual ~ChromeClassTester();
 
-  void FigureOutSrcRoot();
   void BuildBannedLists();
 
   // ASTConsumer:
   virtual void HandleTagDeclDefinition(clang::TagDecl* tag);
 
  protected:
   clang::CompilerInstance& instance() { return instance_; }
   clang::Diagnostic& diagnostic() { return diagnostic_; }
 
   // Emits a simple warning; this shouldn't be used if you require printf-style
@@ skipping 16 matching lines @@
   bool InBannedNamespace(clang::Decl* record);
   std::string GetNamespace(clang::Decl* record);
   std::string GetNamespaceImpl(const clang::DeclContext* context,
                                std::string candidate);
   bool InBannedDirectory(clang::SourceLocation loc);
   bool IsIgnoredType(const std::string& base_name);
 
   clang::CompilerInstance& instance_;
   clang::Diagnostic& diagnostic_;
 
-  std::string src_root_;
-
   // List of banned namespaces.
   std::vector<std::string> banned_namespaces_;
 
   // List of banned directories.
   std::vector<std::string> banned_directories_;
 
   // List of types that we don't check.
   std::set<std::string> ignored_record_names_;
 };
 
 #endif  // TOOLS_CLANG_PLUGINS_CHROMECLASSTESTER_H_