Revert of Refactor context creation parameters into a struct.

gpu/command_buffer/common/gles2_cmd_utils.cc

Index: gpu/command_buffer/common/gles2_cmd_utils.cc
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.cc b/gpu/command_buffer/common/gles2_cmd_utils.cc
index 817efc124367008ba1f9efdd241d5a69f192076d..5bc3a1abca7bbf00a2afaa57b3c0d32ebb33d49e 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.cc
+++ b/gpu/command_buffer/common/gles2_cmd_utils.cc
@@ -1843,21 +1843,6 @@
 
 }  // namespace
 
-bool IsWebGLContextType(ContextType context_type) {
-  // Switch statement to cause a compile-time error if we miss a case.
-  switch (context_type) {
-    case CONTEXT_TYPE_WEBGL1:
-    case CONTEXT_TYPE_WEBGL2:
-      return true;
-    case CONTEXT_TYPE_OPENGLES2:
-    case CONTEXT_TYPE_OPENGLES3:
-      return false;
-  }
-
-  NOTREACHED();
-  return false;
-}
-
 ContextCreationAttribHelper::ContextCreationAttribHelper()
     : gpu_preference(gl::PreferIntegratedGpu),
       alpha_size(-1),