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

content/zygote/zygote_linux.cc

Index: content/zygote/zygote_linux.cc
diff --git a/content/zygote/zygote_linux.cc b/content/zygote/zygote_linux.cc
index 8e66788091a4d46e053586956381a7839fa24e81..e9b940e88a76e451384742a46637d51abf0e013e 100644
--- a/content/zygote/zygote_linux.cc
+++ b/content/zygote/zygote_linux.cc
@@ -533,9 +533,9 @@ base::ProcessId Zygote::ReadArgsAndFork(PickleIterator iter,
     base::GlobalDescriptors::GetInstance()->Reset(mapping);
 
     // Reset the process-wide command line to our new command line.
-    CommandLine::Reset();
-    CommandLine::Init(0, NULL);
-    CommandLine::ForCurrentProcess()->InitFromArgv(args);
+    base::CommandLine::Reset();
+    base::CommandLine::Init(0, NULL);
+    base::CommandLine::ForCurrentProcess()->InitFromArgv(args);
 
     // Update the process title. The argv was already cached by the call to
     // SetProcessTitleFromCommandLine in ChromeMain, so we can pass NULL here