Enable ANGLE ES3 by default in Chromium (Windows)

ui/gl/gl_switches.cc

 // Copyright (c) 2012 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/macros.h"
 #include "ui/gl/gl_switches.h"
 
 namespace gl {
 
 const char kGLImplementationDesktopName[]     = "desktop";
@@ skipping 10 matching lines @@
 const char kANGLEImplementationOpenGLName[]   = "gl";
 const char kANGLEImplementationOpenGLESName[] = "gles";
 
 }  // namespace gl
 
 namespace switches {
 
 // Disables use of D3D11.
 const char kDisableD3D11[]                  = "disable-d3d11";
 
+// Disables use of ES3 backend (use ES2 backend instead).
+const char kDisableES3GLContext[]           = "disable-es3-gl-context";
+
 // Stop the GPU from synchronizing on the vsync before presenting.
 // We can select from the options below:
 //  beginframe: Next frame can start without any delay on cc::scheduler in
 //              renderer compositors.
 //  gpu: Disable display and browser vsync.
 //  default: Set both flags.
 const char kDisableGpuVsync[]               = "disable-gpu-vsync";
 
 // Turns on GPU logging (debug build only).
 const char kEnableGPUServiceLogging[]       = "enable-gpu-service-logging";
@@ skipping 74 matching lines @@
     kDisableGLDrawingForTests,
     kOverrideUseGLWithOSMesaForTests,
     kUseANGLE,
     kDisableDirectComposition,
     kEnableSwapBuffersWithDamage,
 };
 const int kGLSwitchesCopiedFromGpuProcessHostNumSwitches =
     arraysize(kGLSwitchesCopiedFromGpuProcessHost);
 
 }  // namespace switches