Command buffers: ensure we only read immediate data once

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
diff --git a/gpu/command_buffer/service/context_group.cc b/gpu/command_buffer/service/context_group.cc
index 94bf14d8f3164098b6e96561c6dc2a9745752a23..2d9d9d14726a2e8be731d3bf1b5d6c61678a090a 100644
--- a/gpu/command_buffer/service/context_group.cc
+++ b/gpu/command_buffer/service/context_group.cc
@@ -160,9 +160,13 @@ bool ContextGroup::Initialize(GLES2Decoder* decoder,
     GetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &max_color_attachments_);
     if (max_color_attachments_ < 1)
       max_color_attachments_ = 1;
+    if (max_color_attachments_ > 16)
+      max_color_attachments_ = 16;
     GetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_draw_buffers_);
     if (max_draw_buffers_ < 1)
       max_draw_buffers_ = 1;
+    if (max_draw_buffers_ > 16)
+      max_draw_buffers_ = 16;
   }
   if (feature_info_->feature_flags().ext_blend_func_extended) {
     GetIntegerv(GL_MAX_DUAL_SOURCE_DRAW_BUFFERS_EXT,