Bug 989466: revert clip-path change made in bug 893661 to fix font scaling. r=dao

browser/base/content/browser.xul

@@ -1185,11 +1185,11 @@
 #include tab-shape.inc.svg
 
 #ifndef XP_MACOSX
-    <svg:clipPath id="keyhole-forward-clip-path" clipPathUnits="userSpaceOnUse">
-      <svg:path d="M 0,0 a 16 16 0 0 1 0,24 l 10000,0 l 0,-24 l -10000,0 z"/>
+    <svg:clipPath id="keyhole-forward-clip-path" clipPathUnits="objectBoundingBox">
+      <svg:path d="m 0,0 c .3,.25 .3,.75, 0,1 l 1,0 0,-1 z"/>
     </svg:clipPath>
     <svg:clipPath id="urlbar-back-button-clip-path" clipPathUnits="userSpaceOnUse">
-      <svg:path d="M -1,1 a 16 16 0 0 1 0,24 l 10000,0 l 0,-24 l -10000,0 z"/>
+      <svg:path d="m 0,-5 l 0,7.8 c 2.5,3.2 4,6.2 4,10.2 c 0,4 -1.5,7 -4,10 l 0,22l10000,0 l 0,-50 l -10000,0 z"/>
     </svg:clipPath>
 #else
     <svg:clipPath id="osx-keyhole-forward-clip-path" clipPathUnits="userSpaceOnUse">