Implemented failIfMajorPerformanceCaveat WebGL context creation attribute.

webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc

Index: webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
index b094a079610e41b794c6774e212a12d121865fd2..dc5598b5a6b4d9892ebdb9332fe66e62bae1a8dd 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
@@ -138,6 +138,8 @@ void WebGraphicsContext3DInProcessCommandBufferImpl::ConvertAttributes(
   output_attribs->stencil_size = attributes.stencil ? 8 : 0;
   output_attribs->samples = attributes.antialias ? 4 : 0;
   output_attribs->sample_buffers = attributes.antialias ? 1 : 0;
+  output_attribs->fail_if_major_perf_caveat =
+      attributes.failIfMajorPerformanceCaveat ? 1 : 0;
 }
 
 bool WebGraphicsContext3DInProcessCommandBufferImpl::MaybeInitializeGL() {