Removed un-used commandline switches.

ui/gl/gl_switches.cc

Index: ui/gl/gl_switches.cc
diff --git a/ui/gl/gl_switches.cc b/ui/gl/gl_switches.cc
index a32c5f6270ecbfbcf43aae98dc550530be6de53d..7eaa3d8c464464888071babb3245a5ad38c59734 100644
--- a/ui/gl/gl_switches.cc
+++ b/ui/gl/gl_switches.cc
@@ -49,13 +49,6 @@ const char kGpuNoContextLost[]              = "gpu-no-context-lost";
 // Indicates whether the dual GPU switching is supported or not.
 const char kSupportsDualGpus[]              = "supports-dual-gpus";
 
-// Overwrite the default GPU automatic switching behavior to force on
-// integrated GPU or discrete GPU.
-const char kGpuSwitching[]                  = "gpu-switching";
-
-const char kGpuSwitchingOptionNameForceIntegrated[] = "force_integrated";
-const char kGpuSwitchingOptionNameForceDiscrete[]   = "force_discrete";
-
 // Flag used for Linux tests: for desktop GL bindings, try to load this GL
 // library first, but fall back to regular library if loading fails.
 const char kTestGLLib[]                     = "test-gl-lib";