Disable GPU info collection on GPU process startup on Win/Mac.

ui/gl/gl_switches.cc

Index: ui/gl/gl_switches.cc
===================================================================
--- ui/gl/gl_switches.cc	(revision 137174)
+++ ui/gl/gl_switches.cc	(working copy)
@@ -52,4 +52,9 @@
 // library first, but fall back to regular library if loading fails.
 const char kTestGLLib[]                     = "test-gl-lib";
 
+// Flags used to pass GPU info from browser process to GPU process.
+const char kGpuVendorID[]                   = "gpu-vendor-id";
+const char kGpuDeviceID[]                   = "gpu-device-id";
+const char kGpuDriverVersion[]              = "gpu-driver-version";
+
 }  // namespace switches