DevTools: [SSP] reduce state of StylePropertiesSection

The patch reduces state of StylePropertiesSection via removing inner
fields "rule" and "isInherited" and replacing them with getters.

R=vsevik

Review URL: https://codereview.chromium.org/720183003

git-svn-id: svn://svn.chromium.org/blink/trunk@185654 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Network: Filter: do not change letter case when user types.

BUG=

Review URL: https://codereview.chromium.org/743913002

git-svn-id: svn://svn.chromium.org/blink/trunk@185657 bbb929c8-8fbe-4397-9dbb-9b2b20218538