Bug 737510 - Print something useful when dumping an ImmutableViewportMetrics. r=Cwiiis

mobile/android/base/gfx/DisplayPortMetrics.java

@@ -43,9 +43,10 @@ public final class DisplayPortMetrics {
         return sb.toString();
     }
 
+    @Override
     public String toString() {
-        return "DisplayPortMetrics(" + mPosition.left + ","
+        return "DisplayPortMetrics v=(" + mPosition.left + ","
                 + mPosition.top + "," + mPosition.right + ","
-                + mPosition.bottom + "," + mResolution + ")";
+                + mPosition.bottom + ") z=" + mResolution;
     }
 }

mobile/android/base/gfx/ImmutableViewportMetrics.java

@@ -81,4 +81,11 @@ public class ImmutableViewportMetrics {
     public FloatSize getCssPageSize() {
         return new FloatSize(cssPageSizeWidth, cssPageSizeHeight);
     }
+
+    @Override
+    public String toString() {
+        return "ImmutableViewportMetrics v=(" + viewportRectLeft + "," + viewportRectTop + ","
+                + viewportRectRight + "," + viewportRectBottom + ") p=(" + pageSizeWidth + ","
+                + pageSizeHeight + ") z=" + zoomFactor;
+    }
 }