Update from https://crrev.com/306655

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 8f5bc35cf407344b282aeb778e73be2b48357272..7298140cfbcb152d23533abcdc5ac8c6e6d8b480 100644
--- a/gpu/command_buffer/service/gpu_switches.cc
+++ b/gpu/command_buffer/service/gpu_switches.cc
@@ -56,11 +56,18 @@ const char kDisableGpuShaderDiskCache[]     = "disable-gpu-shader-disk-cache";
 const char kEnableShareGroupAsyncTextureUpload[] =
     "enable-share-group-async-texture-upload";
 
+// Enable WebGL subscribe uniform extension.
+const char kEnableSubscribeUniformExtension[] =
+    "enable-subscribe-uniform-extension";
+
 // Simulates shared textures when share groups are not available. Not available
 // everywhere.
 const char kEnableThreadedTextureMailboxes[] =
     "enable-threaded-texture-mailboxes";
 
+// Enable OpenGL ES 3 APIs without proper service side validation.
+const char kEnableUnsafeES3APIs[] = "enable-unsafe-es3-apis";
+
 const char* kGpuSwitches[] = {
   kCompileShaderAlwaysSucceeds,
   kDisableGLErrorLimit,
@@ -77,6 +84,8 @@ const char* kGpuSwitches[] = {
   kGpuProgramCacheSizeKb,
   kDisableGpuShaderDiskCache,
   kEnableShareGroupAsyncTextureUpload,
+  kEnableUnsafeES3APIs,
+  kEnableSubscribeUniformExtension,
 };
 
 const int kNumGpuSwitches = arraysize(kGpuSwitches);