Rename TextMatchMarker::rendered_rect_ to layout_rect_

Rename TextMatchMarker::rendered_rect_ to layout_rect_ and TextMatchMarker
methods with "RenderedRect" in name to instead use "LayoutRect". LayoutRect is a
more specific name than RenderedRect (layout is one step in the rendering
pipeline).

BUG=707867

Review-Url: https://codereview.chromium.org/2920913003
Cr-Commit-Position: refs/heads/master@{#477008}
8 files changed