Include CSSPropertyID HashTraits in renderer/core/svg/svg_element.cc

SVGElement::CssPropertyIdForSVGAttributeName has a:

  HashMap<StringImpl*, CSSPropertyID>

which will require traits for the value (CSSPropertyID). Without Jumbo
this usually works out by using the default traits.

Bug: 890434
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I6ff50a0648106057dad898d1fe6d79e9a53a1bd2
Reviewed-on: https://chromium-review.googlesource.com/1253662Reviewed-by: Daniel Bratell <bratell@opera.com>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#595414}

third_party/blink/renderer/core/svg/svg_element.cc

@@ -33,6 +33,7 @@
 #include "third_party/blink/renderer/core/animation/keyframe_effect.h"
 #include "third_party/blink/renderer/core/animation/svg_interpolation_environment.h"
 #include "third_party/blink/renderer/core/animation/svg_interpolation_types_map.h"
+#include "third_party/blink/renderer/core/css/css_property_id_templates.h"
 #include "third_party/blink/renderer/core/css/resolver/style_resolver.h"
 #include "third_party/blink/renderer/core/dom/document.h"
 #include "third_party/blink/renderer/core/dom/element_traversal.h"