Use container::back() and container::pop_back().

gpu/config/gpu_control_list.cc

 // Copyright (c) 2013 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 "gpu/config/gpu_control_list.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 20 matching lines @@
                           std::vector<std::string>* version) {
   DCHECK(version);
   *version = base::SplitString(
       version_string, std::string(1, splitter),
       base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   if (version->size() == 0)
     return false;
   // If the splitter is '-', we assume it's a date with format "mm-dd-yyyy";
   // we split it into the order of "yyyy", "mm", "dd".
   if (splitter == '-') {
-    std::string year = (*version)[version->size() - 1];
+    std::string year = version->back();
     for (int i = version->size() - 1; i > 0; --i) {
       (*version)[i] = (*version)[i - 1];
     }
     (*version)[0] = year;
   }
   bool all_zero = true;
   for (size_t i = 0; i < version->size(); ++i) {
     unsigned num = 0;
     if (!base::StringToUint((*version)[i], &num))
       return false;
@@ skipping 66 matching lines @@
 
 const char kGLTypeStringGL[] = "gl";
 const char kGLTypeStringGLES[] = "gles";
 const char kGLTypeStringANGLE[] = "angle";
 
 const char kVersionStyleStringNumerical[] = "numerical";
 const char kVersionStyleStringLexical[] = "lexical";
 
 const char kOp[] = "op";
 
-}  // namespace anonymous
+}  // namespace
 
 GpuControlList::VersionInfo::VersionInfo(
     const std::string& version_op,
     const std::string& version_style,
     const std::string& version_string,
     const std::string& version_string2)
     : version_style_(kVersionStyleNumerical) {
   op_ = StringToNumericOp(version_op);
   if (op_ == kUnknown || op_ == kAny)
     return;
@@ skipping 1477 matching lines @@
     const std::string& feature_name, int feature_id) {
   feature_map_[feature_name] = feature_id;
 }
 
 void GpuControlList::set_supports_feature_type_all(bool supported) {
   supports_feature_type_all_ = supported;
 }
 
 }  // namespace gpu