Bug 1621359 - Update .idl files to work with ply3 r=mccr8

This pattern:
```
native nsSize (nsSize);
             ^
```
Causes a parsing error in `ply` 3.10. This can be easily fixed by removing the space and reformatting to this:
```
native nsSize(nsSize);
```

Differential Revision: https://phabricator.services.mozilla.com/D70711

--HG--
extra : moz-landing-system : lando

widget/nsIDragSession.idl

@@ -14,7 +14,7 @@
 %}
 interface nsIContentSecurityPolicy;
 
-native nsSize (nsSize);
+native nsSize(nsSize);
 
 webidl DataTransfer;
 webidl Document;
@@ -69,7 +69,7 @@ interface nsIDragSession : nsISupports
    * csp when sourceNode is xul:browser and the drag is
    * triggered in a browsing context inside it.
    */
-  attribute nsIContentSecurityPolicy csp; 
+  attribute nsIContentSecurityPolicy csp;
 
   /**
    * The data transfer object for the current drag.

xpcom/base/nsICycleCollectorListener.idl

@@ -11,7 +11,7 @@ class nsCycleCollectorLogger;
 %}
 
 [ptr] native FILE(FILE);
-[ptr] native nsCycleCollectorLoggerPtr (nsCycleCollectorLogger);
+[ptr] native nsCycleCollectorLoggerPtr(nsCycleCollectorLogger);
 interface nsIFile;
 
 /**