Add back invalid natives that couldn't be removed due to analyzer warnings.

sdk/lib/_blink/dartium/_blink_dartium.dart

Index: sdk/lib/_blink/dartium/_blink_dartium.dart
diff --git a/sdk/lib/_blink/dartium/_blink_dartium.dart b/sdk/lib/_blink/dartium/_blink_dartium.dart
index 89998a4aa40bb42b15da3542c2ba37d33c4137cb..f32673fd4d7b7771f65d0ac95c492ed62d49da21 100644
--- a/sdk/lib/_blink/dartium/_blink_dartium.dart
+++ b/sdk/lib/_blink/dartium/_blink_dartium.dart
@@ -5221,6 +5221,8 @@ Native_SVGElementInstance_parentNode_Getter(mthis) native "SVGElementInstance_pa
 
 Native_SVGElementInstance_previousSibling_Getter(mthis) native "SVGElementInstance_previousSibling_Getter";
 
+Native_SVGElementInstanceList_length_Getter(mthis) native "SVGElementInstanceList_length_Getter";
+
 Native_SVGElementInstanceList_NativeIndexed_Getter(mthis, index) native "SVGElementInstanceList_item_Callback_RESOLVER_STRING_1_unsigned long";
 
 Native_SVGElementInstanceList_item_Callback(mthis, index) native "SVGElementInstanceList_item_Callback_RESOLVER_STRING_1_unsigned long";
@@ -6668,6 +6670,8 @@ Native_SpeechGrammarList__addFromUri_2_Callback(mthis, src) native "SpeechGramma
 
 Native_SpeechGrammarList_item_Callback(mthis, index) native "SpeechGrammarList_item_Callback_RESOLVER_STRING_1_unsigned long";
 
+Native_SpeechInputResultList_length_Getter(mthis) native "SpeechInputResultList_length_Getter";
+
 Native_SpeechInputResultList_NativeIndexed_Getter(mthis, index) native "SpeechInputResultList_item_Callback_RESOLVER_STRING_1_unsigned long";
 
 Native_SpeechInputResultList_item_Callback(mthis, index) native "SpeechInputResultList_item_Callback_RESOLVER_STRING_1_unsigned long";