Offset rects by origin when projecting from composited to graphics layer.

LayoutTests/fast/events/touch/compositor-touch-hit-rects.html

Index: LayoutTests/fast/events/touch/compositor-touch-hit-rects.html
diff --git a/LayoutTests/fast/events/touch/compositor-touch-hit-rects.html b/LayoutTests/fast/events/touch/compositor-touch-hit-rects.html
index 0361a4f661dd9f05e9ba95eaaeb86faa9999cb28..20c840b677d9b8e84ea0c0a4a2235bc86fd02382 100644
--- a/LayoutTests/fast/events/touch/compositor-touch-hit-rects.html
+++ b/LayoutTests/fast/events/touch/compositor-touch-hit-rects.html
@@ -37,6 +37,21 @@
   margin-top: 15px;
   margin-bottom: 10px;
 }
+#withNegativeOffsetChild {
+    position: relative;
+    width: 100px;
+    height: 10px;
+    border: 1px dotted blue;
+    transform: translateX(calc(120%)) translateZ(0);
+    clear: both;
+}
+#negativeOffsetChild {
+    position: absolute;
+    width: 100px;
+    height: 10px;
+    left: calc(-110%);
+    top: 0px;
+}
 #transform3dChild {
   -webkit-transform: rotate3d(0.2, 1, 0, 50grad);
 }
@@ -92,6 +107,9 @@ to quickly validate graphically.</p>
   <div class="testcase" id="transform3d">
     <div id="transform3dChild">Transformed 3D</div>
   </div>
+  <div id="withNegativeOffsetChild">
+      <div id="negativeOffsetChild" class="testcase"></div>
+  </div>
   <div>
     <b class="testcase" id="continuation">
       This b tag