Add support for EXT_sRGB.

BUG=angle:672

Change-Id: I001ff3dde7a39e545a535a399c02f3a6d91634c8
Reviewed-on: https://chromium-review.googlesource.com/203460
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libGLESv2/renderer/d3d11/Renderer11.cpp b/src/libGLESv2/renderer/d3d11/Renderer11.cpp
index a58822f..11033cb 100644
--- a/src/libGLESv2/renderer/d3d11/Renderer11.cpp
+++ b/src/libGLESv2/renderer/d3d11/Renderer11.cpp
@@ -2037,6 +2037,11 @@
     return std::numeric_limits<GLint>::max();
 }
 
+bool Renderer11::getSRGBTextureSupport() const
+{
+    return true;
+}
+
 int Renderer11::getMajorShaderModel() const
 {
     switch (mFeatureLevel)