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

content/renderer/renderer_main.cc

Index: content/renderer/renderer_main.cc
diff --git a/content/renderer/renderer_main.cc b/content/renderer/renderer_main.cc
index 791fc7726a110794370b621dee559fd2c83d6dc3..5b01d56ad6debe21641b030af0705bf93fbc53dc 100644
--- a/content/renderer/renderer_main.cc
+++ b/content/renderer/renderer_main.cc
@@ -57,7 +57,8 @@ namespace content {
 namespace {
 // This function provides some ways to test crash and assertion handling
 // behavior of the renderer.
-static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
+static void HandleRendererErrorTestParameters(
+    const base::CommandLine& command_line) {
   if (command_line.HasSwitch(switches::kWaitForDebugger))
     base::debug::WaitForDebugger(60, true);
 
@@ -104,7 +105,7 @@ int RendererMain(const MainFunctionParams& parameters) {
   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
       kTraceEventRendererProcessSortIndex);
 
-  const CommandLine& parsed_command_line = parameters.command_line;
+  const base::CommandLine& parsed_command_line = parameters.command_line;
 
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;