Add a "Max. MSAA samples" entry to chrome://gpu.

gpu/config/gpu_info.cc

Index: gpu/config/gpu_info.cc
diff --git a/gpu/config/gpu_info.cc b/gpu/config/gpu_info.cc
index 2cba5d82a3f38af0740dc816f8b8e927ac0de282..3653a106b90cf39ed92d3343a397b04eb15f2a58 100644
--- a/gpu/config/gpu_info.cc
+++ b/gpu/config/gpu_info.cc
@@ -79,6 +79,7 @@ void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
     std::string driver_date;
     std::string pixel_shader_version;
     std::string vertex_shader_version;
+    std::string max_msaa_samples;
     std::string machine_model_name;
     std::string machine_model_version;
     std::string gl_version_string;
@@ -135,6 +136,7 @@ void GPUInfo::EnumerateFields(Enumerator* enumerator) const {
   enumerator->AddString("driverDate", driver_date);
   enumerator->AddString("pixelShaderVersion", pixel_shader_version);
   enumerator->AddString("vertexShaderVersion", vertex_shader_version);
+  enumerator->AddString("maxMsaaSamples", max_msaa_samples);
   enumerator->AddString("glVersion", gl_version);
   enumerator->AddString("glVendor", gl_vendor);
   enumerator->AddString("glRenderer", gl_renderer);