Exposing native doubles as doubles when they are read-only or method return values.

sdk/lib/svg/dartium/svg_dartium.dart

Index: sdk/lib/svg/dartium/svg_dartium.dart
diff --git a/sdk/lib/svg/dartium/svg_dartium.dart b/sdk/lib/svg/dartium/svg_dartium.dart
index 35fa28a6a28378989ec98ab9316740ec84ac2c2d..8dfcbffd91420f1cc3de2149898b750382888faf 100644
--- a/sdk/lib/svg/dartium/svg_dartium.dart
+++ b/sdk/lib/svg/dartium/svg_dartium.dart
@@ -485,7 +485,7 @@ class AnimatedNumber extends NativeFieldWrapperClass1 {
 
   @DomName('SVGAnimatedNumber.animVal')
   @DocsEditable()
-  num get animVal native "SVGAnimatedNumber_animVal_Getter";
+  double get animVal native "SVGAnimatedNumber_animVal_Getter";
 
   @DomName('SVGAnimatedNumber.baseVal')
   @DocsEditable()
@@ -629,15 +629,15 @@ class AnimationElement extends SvgElement implements ExternalResourcesRequired,
 
   @DomName('SVGAnimationElement.getCurrentTime')
   @DocsEditable()
-  num getCurrentTime() native "SVGAnimationElement_getCurrentTime_Callback";
+  double getCurrentTime() native "SVGAnimationElement_getCurrentTime_Callback";
 
   @DomName('SVGAnimationElement.getSimpleDuration')
   @DocsEditable()
-  num getSimpleDuration() native "SVGAnimationElement_getSimpleDuration_Callback";
+  double getSimpleDuration() native "SVGAnimationElement_getSimpleDuration_Callback";
 
   @DomName('SVGAnimationElement.getStartTime')
   @DocsEditable()
-  num getStartTime() native "SVGAnimationElement_getStartTime_Callback";
+  double getStartTime() native "SVGAnimationElement_getStartTime_Callback";
 
   @DomName('SVGAnimationElement.beginElement')
   @DocsEditable()
@@ -3435,7 +3435,7 @@ class LengthList extends NativeFieldWrapperClass1 with ListMixin<Length>, Immuta
   Length operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
-    return this.getItem(index)(index);
+    return getItem(index);
   }
 
   void operator[]=(int index, Length value) {
@@ -4024,7 +4024,7 @@ class NumberList extends NativeFieldWrapperClass1 with ListMixin<Number>, Immuta
   Number operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
-    return this.getItem(index)(index);
+    return getItem(index);
   }
 
   void operator[]=(int index, Number value) {
@@ -4220,7 +4220,7 @@ class PathElement extends StyledElement implements Transformable, ExternalResour
 
   @DomName('SVGPathElement.getTotalLength')
   @DocsEditable()
-  num getTotalLength() native "SVGPathElement_getTotalLength_Callback";
+  double getTotalLength() native "SVGPathElement_getTotalLength_Callback";
 
   @DomName('SVGPathElement.externalResourcesRequired')
   @DocsEditable()
@@ -5094,7 +5094,7 @@ class PathSegList extends NativeFieldWrapperClass1 with ListMixin<PathSeg>, Immu
   PathSeg operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
-    return this.getItem(index)(index);
+    return getItem(index);
   }
 
   void operator[]=(int index, PathSeg value) {
@@ -6002,7 +6002,7 @@ class StringList extends NativeFieldWrapperClass1 with ListMixin<String>, Immuta
   String operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
-    return this.getItem(index)(index);
+    return getItem(index);
   }
 
   void operator[]=(int index, String value) {
@@ -6379,19 +6379,19 @@ class SvgSvgElement extends StyledElement implements FitToViewBox, Transformable
 
   @DomName('SVGSVGElement.pixelUnitToMillimeterX')
   @DocsEditable()
-  num get pixelUnitToMillimeterX native "SVGSVGElement_pixelUnitToMillimeterX_Getter";
+  double get pixelUnitToMillimeterX native "SVGSVGElement_pixelUnitToMillimeterX_Getter";
 
   @DomName('SVGSVGElement.pixelUnitToMillimeterY')
   @DocsEditable()
-  num get pixelUnitToMillimeterY native "SVGSVGElement_pixelUnitToMillimeterY_Getter";
+  double get pixelUnitToMillimeterY native "SVGSVGElement_pixelUnitToMillimeterY_Getter";
 
   @DomName('SVGSVGElement.screenPixelToMillimeterX')
   @DocsEditable()
-  num get screenPixelToMillimeterX native "SVGSVGElement_screenPixelToMillimeterX_Getter";
+  double get screenPixelToMillimeterX native "SVGSVGElement_screenPixelToMillimeterX_Getter";
 
   @DomName('SVGSVGElement.screenPixelToMillimeterY')
   @DocsEditable()
-  num get screenPixelToMillimeterY native "SVGSVGElement_screenPixelToMillimeterY_Getter";
+  double get screenPixelToMillimeterY native "SVGSVGElement_screenPixelToMillimeterY_Getter";
 
   @DomName('SVGSVGElement.useCurrentView')
   @DocsEditable()
@@ -6467,7 +6467,7 @@ class SvgSvgElement extends StyledElement implements FitToViewBox, Transformable
 
   @DomName('SVGSVGElement.getCurrentTime')
   @DocsEditable()
-  num getCurrentTime() native "SVGSVGElement_getCurrentTime_Callback";
+  double getCurrentTime() native "SVGSVGElement_getCurrentTime_Callback";
 
   @DomName('SVGSVGElement.getElementById')
   @DocsEditable()
@@ -6804,7 +6804,7 @@ class TextContentElement extends StyledElement implements ExternalResourcesRequi
 
   @DomName('SVGTextContentElement.getComputedTextLength')
   @DocsEditable()
-  num getComputedTextLength() native "SVGTextContentElement_getComputedTextLength_Callback";
+  double getComputedTextLength() native "SVGTextContentElement_getComputedTextLength_Callback";
 
   @DomName('SVGTextContentElement.getEndPositionOfChar')
   @DocsEditable()
@@ -6820,7 +6820,7 @@ class TextContentElement extends StyledElement implements ExternalResourcesRequi
 
   @DomName('SVGTextContentElement.getRotationOfChar')
   @DocsEditable()
-  num getRotationOfChar(int offset) native "SVGTextContentElement_getRotationOfChar_Callback";
+  double getRotationOfChar(int offset) native "SVGTextContentElement_getRotationOfChar_Callback";
 
   @DomName('SVGTextContentElement.getStartPositionOfChar')
   @DocsEditable()
@@ -6828,7 +6828,7 @@ class TextContentElement extends StyledElement implements ExternalResourcesRequi
 
   @DomName('SVGTextContentElement.getSubStringLength')
   @DocsEditable()
-  num getSubStringLength(int offset, int length) native "SVGTextContentElement_getSubStringLength_Callback";
+  double getSubStringLength(int offset, int length) native "SVGTextContentElement_getSubStringLength_Callback";
 
   @DomName('SVGTextContentElement.selectSubString')
   @DocsEditable()
@@ -7085,7 +7085,7 @@ class Transform extends NativeFieldWrapperClass1 {
 
   @DomName('SVGTransform.angle')
   @DocsEditable()
-  num get angle native "SVGTransform_angle_Getter";
+  double get angle native "SVGTransform_angle_Getter";
 
   @DomName('SVGTransform.matrix')
   @DocsEditable()
@@ -7139,7 +7139,7 @@ class TransformList extends NativeFieldWrapperClass1 with ListMixin<Transform>,
   Transform operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
-    return this.getItem(index)(index);
+    return getItem(index);
   }
 
   void operator[]=(int index, Transform value) {
@@ -7562,7 +7562,7 @@ class ZoomEvent extends UIEvent {
 
   @DomName('SVGZoomEvent.newScale')
   @DocsEditable()
-  num get newScale native "SVGZoomEvent_newScale_Getter";
+  double get newScale native "SVGZoomEvent_newScale_Getter";
 
   @DomName('SVGZoomEvent.newTranslate')
   @DocsEditable()
@@ -7570,7 +7570,7 @@ class ZoomEvent extends UIEvent {
 
   @DomName('SVGZoomEvent.previousScale')
   @DocsEditable()
-  num get previousScale native "SVGZoomEvent_previousScale_Getter";
+  double get previousScale native "SVGZoomEvent_previousScale_Getter";
 
   @DomName('SVGZoomEvent.previousTranslate')
   @DocsEditable()