Add base:: qualification to some CommandLine references in content.

content/browser/zygote_host/zygote_host_impl_linux.cc

Index: content/browser/zygote_host/zygote_host_impl_linux.cc
diff --git a/content/browser/zygote_host/zygote_host_impl_linux.cc b/content/browser/zygote_host/zygote_host_impl_linux.cc
index 81d075688d72530006faf888538cf63980c93854..2c3467e0ecb281828b79eddb31b4902280c75105 100644
--- a/content/browser/zygote_host/zygote_host_impl_linux.cc
+++ b/content/browser/zygote_host/zygote_host_impl_linux.cc
@@ -100,7 +100,7 @@ void ZygoteHostImpl::Init(const std::string& sandbox_cmd) {
 
   base::FilePath chrome_path;
   CHECK(PathService::Get(base::FILE_EXE, &chrome_path));
-  CommandLine cmd_line(chrome_path);
+  base::CommandLine cmd_line(chrome_path);
 
   cmd_line.AppendSwitchASCII(switches::kProcessType, switches::kZygoteProcess);
 
@@ -111,7 +111,8 @@ void ZygoteHostImpl::Init(const std::string& sandbox_cmd) {
   fds_to_map.push_back(std::make_pair(fds[1], kZygoteSocketPairFd));
 
   base::LaunchOptions options;
-  const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
+  const base::CommandLine& browser_command_line =
+      *base::CommandLine::ForCurrentProcess();
   if (browser_command_line.HasSwitch(switches::kZygoteCmdPrefix)) {
     cmd_line.PrependWrapper(
         browser_command_line.GetSwitchValueNative(switches::kZygoteCmdPrefix));