Make callers of CommandLine use it via the base:: namespace.

content/common/set_process_title.cc

Index: content/common/set_process_title.cc
diff --git a/content/common/set_process_title.cc b/content/common/set_process_title.cc
index fdbf06cd0d8a90107dd082f4559ccdcd387f5338..74651ca6c3e437e365d0f7309a84a6f34edd3a6e 100644
--- a/content/common/set_process_title.cc
+++ b/content/common/set_process_title.cc
@@ -70,7 +70,8 @@ void SetProcessTitleFromCommandLine(const char** main_argv) {
   }
 #endif  // defined(OS_LINUX)
 
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  const base::CommandLine* command_line =
+      base::CommandLine::ForCurrentProcess();
   for (size_t i = 1; i < command_line->argv().size(); ++i) {
     if (!title.empty())
       title += " ";