Removed m_isSettingStyleSheetText from InspectorCSSAgent.

The variable supressed an unnecessary re-collection of inspector
stylesheets when the stylesheet text is modified from the inspector. If
the text added contains an @import rule with a data: uri, it also
suppresses the collection of that sheet, which is wrong.

R=pfeldman@chromium.org,lushnikov@chromium.org
BUG=644719

Review-Url: https://codereview.chromium.org/2319533004
Cr-Commit-Position: refs/heads/master@{#417290}
6 files changed