Rename usesOverlayScrollbars of settings to mockScrollbarsUseOverlay

Source/core/testing/InternalSettings.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
 ] interface InternalSettings : InternalSettingsGenerated {
     // All methods which access Page::settings() can raise an exception
     // when the page cannot be accessed. (Such as during page tear-down.)
     [RaisesException] void setMockScrollbarsEnabled(boolean enabled);
+    [RaisesException] void setMockScrollbarsUseOverlay(boolean enabled);
     [RaisesException] void setTouchEventEmulationEnabled(boolean enabled);
     [RaisesException] void setStandardFontFamily(DOMString family, DOMString script);
     [RaisesException] void setSerifFontFamily(DOMString family, DOMString script);
     [RaisesException] void setSansSerifFontFamily(DOMString family, DOMString script);
     [RaisesException] void setFixedFontFamily(DOMString family, DOMString script);
     [RaisesException] void setCursiveFontFamily(DOMString family, DOMString script);
     [RaisesException] void setFantasyFontFamily(DOMString family, DOMString script);
     [RaisesException] void setPictographFontFamily(DOMString family, DOMString script);
     [RaisesException] void setTextAutosizingEnabled(boolean enabled);
     [RaisesException] void setTextAutosizingWindowSizeOverride(long width, long height);
@@ skipping 11 matching lines @@
 
     // FIXME: The following are RuntimeEnabledFeatures and likely
     // cannot be changed after process start.  These setters should
     // be removed or moved onto internals.runtimeFlags:
     void setAuthorShadowDOMForAnyElementEnabled(boolean enabled);
     void setCSSExclusionsEnabled(boolean enabled);
     void setExperimentalWebSocketEnabled(boolean enabled);
     void setLangAttributeAwareFormControlUIEnabled(boolean enabled);
     void setStyleScopedEnabled(boolean enabled);
 };