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

content/browser/browser_main_runner.cc

Index: content/browser/browser_main_runner.cc
diff --git a/content/browser/browser_main_runner.cc b/content/browser/browser_main_runner.cc
index 8701c07cb0aa058e286b2052d1c1381c1a7b4731..a06f18af30dfe3d2a6c4342124c87e6507177daf 100644
--- a/content/browser/browser_main_runner.cc
+++ b/content/browser/browser_main_runner.cc
@@ -146,7 +146,8 @@ class BrowserMainRunnerImpl : public BrowserMainRunner {
     // The shutdown tracing got enabled in AttemptUserExit earlier, but someone
     // needs to write the result to disc. For that a dumper needs to get created
     // which will dump the traces to disc when it gets destroyed.
-    const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+    const base::CommandLine& command_line =
+        *base::CommandLine::ForCurrentProcess();
     scoped_ptr<BrowserShutdownProfileDumper> shutdown_profiler;
     if (command_line.HasSwitch(switches::kTraceShutdown)) {
       shutdown_profiler.reset(new BrowserShutdownProfileDumper(