Allow creating GLImage-backed textures with glTexStorage2D.

gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
diff --git a/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h b/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
index b6a91d84d79f75c01eb1d7a2263ceed1077148f8..0915ccf40c73e3b5f314e47e3e7888bbf80b287e 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
+++ b/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
@@ -771,6 +771,12 @@ static const GLES2Util::EnumToString enum_to_string_table[] = {
     {
         0x78FC, "GL_RGB_YCBCR_420V_CHROMIUM",
     },
+    {
+        0x78FD, "GL_TEXTURE_BUFFER_USAGE_CHROMIUM",
+    },
+    {
+        0x78FE, "GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM",
+    },
     {
         0x8, "GL_CA_LAYER_EDGE_TOP_CHROMIUM",
     },
@@ -5334,6 +5340,16 @@ std::string GLES2Util::GetStringTextureBindTarget(uint32_t value) {
                                            arraysize(string_table), value);
 }
 
+std::string GLES2Util::GetStringTextureBufferUsage(uint32_t value) {
+  static const EnumToString string_table[] = {
+      {GL_NONE, "GL_NONE"},
+      {GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM,
+       "GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM"},
+  };
+  return GLES2Util::GetQualifiedEnumString(string_table,
+                                           arraysize(string_table), value);
+}
+
 std::string GLES2Util::GetStringTextureCompareFunc(uint32_t value) {
   static const EnumToString string_table[] = {
       {GL_LEQUAL, "GL_LEQUAL"}, {GL_GEQUAL, "GL_GEQUAL"},