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

content/common/gpu/image_transport_surface_calayer_mac.mm

 // Copyright 2014 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 "content/common/gpu/image_transport_surface_calayer_mac.h"
 
 #include <OpenGL/CGLRenderers.h>
 
 #include "base/command_line.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 76 matching lines @@
              forLayerTime:timeInterval
               displayTime:timeStamp];
 }
 
 @end
 
 namespace content {
 
 CALayerStorageProvider::CALayerStorageProvider(
     ImageTransportSurfaceFBO* transport_surface)
-        : transport_surface_(transport_surface),
-          gpu_vsync_disabled_(CommandLine::ForCurrentProcess()->HasSwitch(
-              switches::kDisableGpuVsync)),
-          throttling_disabled_(false),
-          has_pending_draw_(false),
-          can_draw_returned_false_count_(0),
-          fbo_texture_(0),
-          fbo_scale_factor_(1),
-          recreate_layer_after_gpu_switch_(false),
-          pending_draw_weak_factory_(this) {
+    : transport_surface_(transport_surface),
+      gpu_vsync_disabled_(base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableGpuVsync)),
+      throttling_disabled_(false),
+      has_pending_draw_(false),
+      can_draw_returned_false_count_(0),
+      fbo_texture_(0),
+      fbo_scale_factor_(1),
+      recreate_layer_after_gpu_switch_(false),
+      pending_draw_weak_factory_(this) {
   ui::GpuSwitchingManager::GetInstance()->AddObserver(this);
 }
 
 CALayerStorageProvider::~CALayerStorageProvider() {
   ui::GpuSwitchingManager::GetInstance()->RemoveObserver(this);
 }
 
 gfx::Size CALayerStorageProvider::GetRoundedSize(gfx::Size size) {
   return size;
 }
@@ skipping 254 matching lines @@
     return;
   pending_draw_weak_factory_.InvalidateWeakPtrs();
   has_pending_draw_ = false;
   transport_surface_->SendSwapBuffers(
       ui::SurfaceHandleFromCAContextID([context_ contextId]),
       fbo_pixel_size_,
       fbo_scale_factor_);
 }
 
 }  //  namespace content