Bug 1431774 part 7. de-COM the image loading content forceImageState API. r=mystor

MozReview-Commit-ID: LKlo36VHKP5

dom/base/nsIImageLoadingContent.idl

@@ -165,11 +165,11 @@ interface nsIImageLoadingContent : imgINotificationObserver
   [noscript] nsIStreamListener loadImageWithChannel(in nsIChannel aChannel);
 
   /**
-   * Enables/disables image state forcing. When |aForce| is PR_TRUE, we force
+   * Enables/disables image state forcing. When |aForce| is true, we force
    * nsImageLoadingContent::ImageState() to return |aState|. Call again with |aForce|
-   * as PR_FALSE to revert ImageState() to its original behaviour.
+   * as false to revert ImageState() to its original behaviour.
    */
-  [noscript] void forceImageState(in boolean aForce, in unsigned long long aState);
+  [notxpcom, nostdcall] void forceImageState(in boolean aForce, in unsigned long long aState);
 
   /**
    * The intrinsic size and width of this content. May differ from actual image

dom/base/nsImageLoadingContent.cpp

@@ -1057,13 +1057,12 @@ nsImageLoadingContent::LoadImage(nsIURI* aNewURI,
   return NS_OK;
 }
 
-nsresult
+void
 nsImageLoadingContent::ForceImageState(bool aForce,
                                        EventStates::InternalType aState)
 {
   mIsImageStateForced = aForce;
   mForcedImageState = EventStates(aState);
-  return NS_OK;
 }
 
 NS_IMETHODIMP