Move TrimWhitespace to the base namespace.

base/process/process_metrics_linux.cc

Index: base/process/process_metrics_linux.cc
diff --git a/base/process/process_metrics_linux.cc b/base/process/process_metrics_linux.cc
index f6ab819f5fc405f9788a75ad186172beec404e67..7fa50922d572575206532ce1fee30d9235a58b72 100644
--- a/base/process/process_metrics_linux.cc
+++ b/base/process/process_metrics_linux.cc
@@ -36,7 +36,7 @@ static uint64 ReadFileToUint64(const base::FilePath file) {
   std::string file_as_string;
   if (!ReadFileToString(file, &file_as_string))
     return 0;
-  TrimWhitespaceASCII(file_as_string, TRIM_ALL, &file_as_string);
+  base::TrimWhitespaceASCII(file_as_string, base::TRIM_ALL, &file_as_string);
   uint64 file_as_uint64 = 0;
   if (!base::StringToUint64(file_as_string, &file_as_uint64))
     return 0;
@@ -71,7 +71,8 @@ size_t ReadProcStatusAndGetFieldAsSizeT(pid_t pid, const std::string& field) {
           std::string value_str;
           tokenizer.token_piece().CopyToString(&value_str);
           std::string value_str_trimmed;
-          TrimWhitespaceASCII(value_str, TRIM_ALL, &value_str_trimmed);
+          base::TrimWhitespaceASCII(value_str, base::TRIM_ALL,
+                                    &value_str_trimmed);
           std::vector<std::string> split_value_str;
           SplitString(value_str_trimmed, ' ', &split_value_str);
           if (split_value_str.size() != 2 || split_value_str[1] != "kB") {