Drop redundant null checks in SVGListPropertyTearOffHelper

All interfaces that use this code has [TypeChecking=Interface] so the
generated code will do type checking and throw exceptions on invalid
arguments. The error handling code removed here could thus never trigger.

This patch depends on these fixes for indexed setter type checking:
  https://codereview.chromium.org/862403002/
  https://codereview.chromium.org/871443002/

Review URL: https://codereview.chromium.org/827373003

git-svn-id: svn://svn.chromium.org/blink/trunk@188821 bbb929c8-8fbe-4397-9dbb-9b2b20218538
9 files changed
tree: de6f936fa853d99b229620234d4f5763a60064c6
  1. third_party/