[geolocation] Add [Exposed=Window] attribute to interfaces

This is a no-op since [Exposed=Window] is the default for interfaces. It
updates Blink's WebIDL to match the specification as modified in,

https://github.com/w3c/geolocation-api/pull/32

Bug: 931847
Change-Id: I5084d84f9c5558ca64ee7aeaef87e00b791a90ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1766005
Commit-Queue: Matt Reynolds <mattreynolds@chromium.org>
Auto-Submit: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Matt Reynolds <mattreynolds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689739}

third_party/blink/renderer/modules/geolocation/coordinates.idl

@@ -24,6 +24,7 @@
  */
 
 [
+    Exposed=Window,
     NoInterfaceObject
 ] interface Coordinates {
     readonly attribute double latitude;

third_party/blink/renderer/modules/geolocation/geolocation.idl

@@ -26,6 +26,7 @@
 // https://www.w3.org/TR/geolocation-API/#geolocation_interface
 [
     ActiveScriptWrappable,
+    Exposed=Window,
     NoInterfaceObject
 ] interface Geolocation {
     [

third_party/blink/renderer/modules/geolocation/position.idl

@@ -26,6 +26,7 @@
 // https://www.w3.org/TR/geolocation-API/#position_interface
 
 [
+    Exposed=Window,
     NoInterfaceObject,
     ImplementedAs=Geoposition
 ] interface Position {

third_party/blink/renderer/modules/geolocation/position_error.idl

@@ -24,6 +24,7 @@
  */
 
 [
+    Exposed=Window,
     NoInterfaceObject
 ] interface PositionError {
     readonly attribute unsigned short code;