Connect up --disable-gl-multisampling to command buffer

gpu/command_buffer/service/gpu_processor_linux.cc

Index: gpu/command_buffer/service/gpu_processor_linux.cc
diff --git a/gpu/command_buffer/service/gpu_processor_linux.cc b/gpu/command_buffer/service/gpu_processor_linux.cc
index cca86635fb12c761324ec4dda4789a699932b0cb..bb37742b8356e06eda386a9885a60577a775be7c 100644
--- a/gpu/command_buffer/service/gpu_processor_linux.cc
+++ b/gpu/command_buffer/service/gpu_processor_linux.cc
@@ -11,6 +11,7 @@ namespace gpu {
 
 bool GPUProcessor::Initialize(gfx::PluginWindowHandle window,
                               const gfx::Size& size,
+                              const gles2::DisallowedExtensions& disallowed,
                               const char* allowed_extensions,
                               const std::vector<int32>& attribs,
                               GPUProcessor* parent,
@@ -45,6 +46,7 @@ bool GPUProcessor::Initialize(gfx::PluginWindowHandle window,
 
   return InitializeCommon(context.release(),
                           size,
+                          disallowed,
                           allowed_extensions,
                           attribs,
                           parent_decoder,