Implement filter effects region for reference filters.

LayoutTests/css3/filters/effect-reference-colorspace.html

Index: LayoutTests/css3/filters/effect-reference-colorspace.html
diff --git a/LayoutTests/css3/filters/effect-reference-colorspace.html b/LayoutTests/css3/filters/effect-reference-colorspace.html
index 727fbfccd73999a743c586206c3b0566b1ad9e77..2565c42eb5a54bd1ecfa4df01079a9d7bc744220 100644
--- a/LayoutTests/css3/filters/effect-reference-colorspace.html
+++ b/LayoutTests/css3/filters/effect-reference-colorspace.html
@@ -1,16 +1,16 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="0" height="0" version="1.1">
   <defs>
-    <filter id="blend" color-interpolation-filters="linearRGB">
+    <filter id="blend" color-interpolation-filters="linearRGB" x="-15%" y="-15%" width="130%" height="130%">
       <feGaussianBlur stdDeviation="5 5" color-interpolation-filters="sRGB"/>
       <feBlend in2="SourceGraphic" mode="screen" color-interpolation-filters="linearRGB"/>
     </filter>
 
-    <filter id="blend-s" color-interpolation-filters="sRGB">
+    <filter id="blend-s" color-interpolation-filters="sRGB" x="-15%" y="-15%" width="130%" height="130%">
       <feGaussianBlur stdDeviation="5 5" color-interpolation-filters="linearRGB"/>
       <feBlend in2="SourceGraphic" mode="screen" color-interpolation-filters="sRGB"/>
     </filter>
 
-    <filter id="lighting" color-interpolation-filters="linearRGB">
+    <filter id="lighting" color-interpolation-filters="linearRGB" x="0%" y="0%" width="100%" height="100%">
       <feSpecularLighting color-interpolation-filters="sRGB">
         <feSpotLight pointsAtX="160" pointsAtY="130" pointsAtZ="0" specularExponent="1" limitingConeAngle="20" x="0" y="0" z="10" color-interpolation-filters="linearRGB"/>
       </feSpecularLighting>
@@ -18,7 +18,7 @@
       <feBlend in2="SourceGraphic" mode="multiply" color-interpolation-filters="linearRGB"/>
     </filter>
 
-    <filter id="lighting-s" color-interpolation-filters="sRGB">
+    <filter id="lighting-s" color-interpolation-filters="sRGB" x="0%" y="0%" width="100%" height="100%">
       <feSpecularLighting color-interpolation-filters="linearRGB">
         <feSpotLight pointsAtX="160" pointsAtY="130" pointsAtZ="0" specularExponent="1" limitingConeAngle="20" x="0" y="0" z="10" color-interpolation-filters="sRGB"/>
       </feSpecularLighting>
@@ -26,7 +26,7 @@
       <feBlend in2="SourceGraphic" mode="multiply" color-interpolation-filters="sRGB"/>
     </filter>
 
-    <filter id="merge">
+    <filter id="merge" x="0%" y="0%" width="120%" height="120%">
       <feColorMatrix type="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 0.3 0"  result="trans" color-interpolation-filters="linearRGB"/>
       <feOffset dx="5"  dy="5"  in="trans" result="offset1" color-interpolation-filters="linearRGB"/>
       <feOffset dx="10" dy="10" in="trans" result="offset2" color-interpolation-filters="linearRGB"/>
@@ -39,7 +39,7 @@
       </feMerge>
     </filter>
 
-    <filter id="merge-s" color-interpolation-filters="sRGB">
+    <filter id="merge-s" color-interpolation-filters="sRGB" x="0%" y="0%" width="120%" height="120%">
       <feColorMatrix type="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 0.3 0"  result="trans"/>
       <feOffset dx="5"  dy="5"  in="trans" result="offset1"/>
       <feOffset dx="10" dy="10" in="trans" result="offset2"/>