Use fastGetAttribute in more places

We can use fastGetAttribute in more places, as long as it is not an SVG animatable or style property. The HTMLTableSectionElement getAttributes don't have to be replaced since the code is not needed anymore,  HTMLTableSectionElement.idl uses Reflect for these getters/setters.

Review URL: https://codereview.chromium.org/150103007

git-svn-id: svn://svn.chromium.org/blink/trunk@167114 bbb929c8-8fbe-4397-9dbb-9b2b20218538