Cleanup some javascript color code

This CL changes the color conversion methods to return their result
instead of taking an out param.

Change-Id: I19ca2b395145866533c7f93cbad80cdf4d7df05d
Reviewed-on: https://pdfium-review.googlesource.com/16530
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/javascript/PublicMethods.cpp b/fpdfsdk/javascript/PublicMethods.cpp
index 2e7387e..5e42800 100644
--- a/fpdfsdk/javascript/PublicMethods.cpp
+++ b/fpdfsdk/javascript/PublicMethods.cpp
@@ -924,16 +924,12 @@
         CJS_Value vProp(pRuntime);
         fTarget->get_text_color(pRuntime, &vProp, &sError);
 
-        CJS_Array aProp = vProp.ToArray(pRuntime);
-        CFX_Color crProp;
-        CFX_Color crColor;
-        color::ConvertArrayToPWLColor(pRuntime, aProp, &crProp);
-        color::ConvertArrayToPWLColor(pRuntime, arColor, &crColor);
-
+        CFX_Color crProp =
+            color::ConvertArrayToPWLColor(pRuntime, vProp.ToArray(pRuntime));
+        CFX_Color crColor = color::ConvertArrayToPWLColor(pRuntime, arColor);
         if (crColor != crProp) {
-          CJS_Value vProp2(pRuntime, arColor);
-
-          fTarget->set_text_color(pRuntime, vProp2, &sError);
+          fTarget->set_text_color(pRuntime, CJS_Value(pRuntime, arColor),
+                                  &sError);
         }
       }
     }