Revert of Get rid of gpu related switches by passing gpu::GpuPreferences via IPC.

gpu/command_buffer/service/gpu_switches.cc

Index: gpu/command_buffer/service/gpu_switches.cc
diff --git a/gpu/command_buffer/service/gpu_switches.cc b/gpu/command_buffer/service/gpu_switches.cc
index 389afcb902ced747c69ed704c857eac798c8cadd..a02c4845b8239298cd7c79f8fdf6073f7e99dac8 100644
--- a/gpu/command_buffer/service/gpu_switches.cc
+++ b/gpu/command_buffer/service/gpu_switches.cc
@@ -71,4 +71,27 @@
 // round intermediate values in ANGLE.
 const char kEmulateShaderPrecision[] = "emulate-shader-precision";
 
+const char* kGpuSwitches[] = {
+    kCompileShaderAlwaysSucceeds,
+    kDisableGLErrorLimit,
+    kDisableGLSLTranslator,
+    kDisableGpuDriverBugWorkarounds,
+    kDisableShaderNameHashing,
+    kEnableGPUCommandLogging,
+    kEnableGPUDebugging,
+    kEnableGPUServiceLoggingGPU,
+    kDisableGpuProgramCache,
+    kEnforceGLMinimums,
+    kForceGpuMemAvailableMb,
+    kGpuDriverBugWorkarounds,
+    kGpuProgramCacheSizeKb,
+    kDisableGpuShaderDiskCache,
+    kEnableShareGroupAsyncTextureUpload,
+    kEnableSubscribeUniformExtension,
+    kGLShaderIntermOutput,
+    kEmulateShaderPrecision,
+};
+
+const int kNumGpuSwitches = arraysize(kGpuSwitches);
+
 }  // namespace switches