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

content/renderer/gin_browsertest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/render_view_test.h"
 #include "content/renderer/render_view_impl.h"
 #include "gin/handle.h"
 #include "gin/per_isolate_data.h"
@@ skipping 25 matching lines @@
 };
 
 gin::WrapperInfo TestGinObject::kWrapperInfo = { gin::kEmbedderNativeGin };
 
 class GinBrowserTest : public RenderViewTest {
  public:
   GinBrowserTest() {}
   ~GinBrowserTest() override {}
 
   void SetUp() override {
-    CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+    base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kJavaScriptFlags, "--expose_gc");
 
     RenderViewTest::SetUp();
   }
 
  private:
 
   DISALLOW_COPY_AND_ASSIGN(GinBrowserTest);
 };
 
@@ skipping 19 matching lines @@
 
   // Should not crash.
   blink::mainThreadIsolate()->LowMemoryNotification();
 
   CHECK(!alive);
 }
 
 } // namespace
 
 }  // namespace content