Enable ANGLE D3D11 runtime for Windows 7+.

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 c519db0e14249ea955986f3cdd586aaf0e9b0819..df512fc2c3d6d9f32c98f845104ff22d159356c6 100644
--- a/ui/gl/gl_switches.cc
+++ b/ui/gl/gl_switches.cc
@@ -18,9 +18,12 @@ const char kGLImplementationMockName[]        = "mock";
 
 namespace switches {
 
-// Enables use of D3D11 when available.
+// Enables use of D3D11 if it would otherwise be disabled by the blacklist.
 const char kEnableD3D11[]                   = "enable-d3d11";
 
+// Disables use of D3D11.
+const char kDisableD3D11[]                  = "disable-d3d11";
+
 // Stop the GPU from synchronizing on the vsync before presenting.
 const char kDisableGpuVsync[]               = "disable-gpu-vsync";
 
@@ -70,6 +73,7 @@ const char kTestGLLib[]                     = "test-gl-lib";
 // to read it in the GPU process, else don't add it.
 const char* kGLSwitchesCopiedFromGpuProcessHost[] = {
   kDisableGpuVsync,
+  kDisableD3D11,
   kEnableD3D11,

[apatrick_chromium, 2013/07/10 18:33:12]

kEnableD3D11 is in this array so it gets forwarded from the browser process to
the GPU process. It can be enabled in about:flags. That's in Canary already.

   kEnableGPUServiceLogging,
   kEnableGPUServiceTracing,