command_buffer: Add support for creating non-WebGL ES 3 contexts

gpu/blink/webgraphicscontext3d_impl.cc

Index: gpu/blink/webgraphicscontext3d_impl.cc
diff --git a/gpu/blink/webgraphicscontext3d_impl.cc b/gpu/blink/webgraphicscontext3d_impl.cc
index 2b39c53fe1b0341f9abef68b5ab20ff4bd5ccf58..de6201be769315d76f427e32df5830e8834715c2 100644
--- a/gpu/blink/webgraphicscontext3d_impl.cc
+++ b/gpu/blink/webgraphicscontext3d_impl.cc
@@ -1251,7 +1251,20 @@ void WebGraphicsContext3DImpl::ConvertAttributes(
   output_attribs->fail_if_major_perf_caveat =
       attributes.failIfMajorPerformanceCaveat;
   output_attribs->bind_generates_resource = false;
-  output_attribs->webgl_version = attributes.webGLVersion;
+  switch (attributes.webGLVersion) {
+    case 0:

[Kimmo Kinnunen, 2015/09/05 10:10:46]

So this case for "webGLVersion" needed to be handled.

+      output_attribs->context_type = ::gpu::gles2::CONTEXT_TYPE_OPENGLES2;
+      break;
+    case 1:
+      output_attribs->context_type = ::gpu::gles2::CONTEXT_TYPE_WEBGL1;
+      break;
+    case 2:
+      output_attribs->context_type = ::gpu::gles2::CONTEXT_TYPE_WEBGL2;
+      break;
+    default:
+      output_attribs->context_type = ::gpu::gles2::CONTEXT_TYPE_OPENGLES2;
+      break;
+  }
 }
 
 }  // namespace gpu_blink