Bug 1505177. Remove gfxContext::CurrentDashOffset(). r=miko

Differential Revision: https://phabricator.services.mozilla.com/D11108

--HG--
extra : rebase_source : 977d4ff035e6b9bdbe79053d154db998d61cc724
extra : amend_source : 66649e6eda2ce762ac8f642525f7b56e612a8510

gfx/thebes/gfxContext.cpp

@@ -505,12 +505,6 @@ gfxContext::CurrentDash(FallibleTArray<Float>& dashes, Float* offset) const
   return true;
 }
 
-Float
-gfxContext::CurrentDashOffset() const
-{
-  return CurrentState().strokeOptions.mDashOffset;
-}
-
 void
 gfxContext::SetLineWidth(Float width)
 {

gfx/thebes/gfxContext.h

@@ -315,8 +315,6 @@ public:
     // context is in an error state.  |offset| can be nullptr to mean
     // "don't care".
     bool CurrentDash(FallibleTArray<Float>& dashes, Float* offset) const;
-    // Returns 0.0 if dashing isn't enabled.
-    Float CurrentDashOffset() const;
 
     /**
      * Sets the line width that's used for line drawing.