Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/command_buffer/service/shader_translator.cc

Index: gpu/command_buffer/service/shader_translator.cc
diff --git a/gpu/command_buffer/service/shader_translator.cc b/gpu/command_buffer/service/shader_translator.cc
index 291b5d4ee1a63d125e9a641d0e616f09dc3f597f..928df8af740482072ac11441d9ab08a735a81935 100644
--- a/gpu/command_buffer/service/shader_translator.cc
+++ b/gpu/command_buffer/service/shader_translator.cc
@@ -15,7 +15,7 @@
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/trace_event/trace_event.h"
-#include "gpu/command_buffer/service/gpu_switches.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_version_info.h"
 
@@ -195,8 +195,7 @@ int ShaderTranslator::GetCompileOptions() const {
       SH_LIMIT_EXPRESSION_COMPLEXITY | SH_LIMIT_CALL_STACK_DEPTH |
       SH_CLAMP_INDIRECT_ARRAY_BOUNDS;
 
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kGLShaderIntermOutput))
+  if (GpuPreferences::GetInstance()->gl_shader_interm_output)
     compile_options |= SH_INTERMEDIATE_TREE;
 
   compile_options |= driver_bug_workarounds_;