Move CommandLine to base namespace.

ui/gfx/gtk_util.h

Index: ui/gfx/gtk_util.h
diff --git a/ui/gfx/gtk_util.h b/ui/gfx/gtk_util.h
index 91f864bbe4ce1cdd79db72d0710246bb7528eb0b..7607603f636370e20d1122a83446c682b02fb20a 100644
--- a/ui/gfx/gtk_util.h
+++ b/ui/gfx/gtk_util.h
@@ -14,9 +14,12 @@ typedef struct _GdkPixbuf GdkPixbuf;
 typedef struct _GdkRegion GdkRegion;
 typedef struct _GdkCursor GdkCursor;
 
-class CommandLine;
 class SkBitmap;
 
+namespace base {
+class CommandLine;
+}
+
 namespace gfx {
 
 class Rect;
@@ -24,8 +27,8 @@ class Rect;
 // Call gtk_init() / gdk_init() using the argc and argv from command_line.
 // These init functions want an argc and argv that they can mutate; we provide
 // those, but leave the original CommandLine unaltered.
-GFX_EXPORT void GtkInitFromCommandLine(const CommandLine& command_line);
-GFX_EXPORT void GdkInitFromCommandLine(const CommandLine& command_line);
+GFX_EXPORT void GtkInitFromCommandLine(const base::CommandLine& command_line);
+GFX_EXPORT void GdkInitFromCommandLine(const base::CommandLine& command_line);
 
 // Convert and copy a SkBitmap to a GdkPixbuf. NOTE: this uses BGRAToRGBA, so
 // it is an expensive operation.  The returned GdkPixbuf will have a refcount of