Bug 762436 - Get rid of the nsresult return value for nsIXPCScriptable::GetScriptableFlags(); r=mrbkap

dom/base/nsDOMClassInfo.cpp

@@ -4777,12 +4777,11 @@ nsDOMClassInfo::GetClassName(char **aClassName)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsDOMClassInfo::GetScriptableFlags(PRUint32 *aFlags)
+// virtual
+PRUint32
+nsDOMClassInfo::GetScriptableFlags()
 {
-  *aFlags = mData->mScriptableFlags;
-
-  return NS_OK;
+  return mData->mScriptableFlags;
 }
 
 NS_IMETHODIMP

dom/base/nsDOMClassInfo.h

@@ -365,15 +365,10 @@ public:
 
     return NS_OK;
   }
-  NS_IMETHOD GetScriptableFlags(PRUint32 *aFlags)
+  virtual PRUint32 GetScriptableFlags()
   {
-    PRUint32 flags;
-    nsresult rv = nsDOMGenericSH::GetScriptableFlags(&flags);
-    if (NS_SUCCEEDED(rv)) {
-      *aFlags = flags | nsIXPCScriptable::WANT_POSTCREATE;
-    }
-
-    return rv;
+    return nsDOMGenericSH::GetScriptableFlags() |
+           nsIXPCScriptable::WANT_POSTCREATE;
   }
 #endif
   NS_IMETHOD GetProperty(nsIXPConnectWrappedNative *wrapper, JSContext *cx,

js/xpconnect/idl/nsIXPCScriptable.idl

@@ -37,7 +37,7 @@
  * to *_retval unless they want to return PR_FALSE.
  */
 
-[uuid(fca22e1e-a2bf-456e-83db-f73e8de0f7c5)]
+[uuid(782d317e-0727-4ccd-8a5b-f5d237f3b03c)]
 interface nsIXPCScriptable : nsISupports
 {
     /* bitflags used for 'flags' (only 32 bits available!) */
@@ -80,7 +80,7 @@ interface nsIXPCScriptable : nsISupports
     const PRUint32 RESERVED                         = 1 << 31;
 
     readonly attribute string   className;
-    readonly attribute PRUint32 scriptableFlags;
+    [notxpcom,nostdcall] PRUint32 getScriptableFlags();
 
     void   preCreate(in nsISupports nativeObj, in JSContextPtr cx,
                      in JSObjectPtr globalObj, out JSObjectPtr parentObj);

js/xpconnect/public/xpc_map_end.h

@@ -24,9 +24,11 @@ NS_IMETHODIMP XPC_MAP_CLASSNAME::GetClassName(char * *aClassName)
 
 /**************************************************************/
 
-NS_IMETHODIMP XPC_MAP_CLASSNAME::GetScriptableFlags(PRUint32 *aFlags)
+// virtual
+PRUint32
+XPC_MAP_CLASSNAME::GetScriptableFlags()
 {
-    *aFlags =
+    return
 #ifdef XPC_MAP_WANT_PRECREATE
     nsIXPCScriptable::WANT_PRECREATE |
 #endif
@@ -85,7 +87,6 @@ NS_IMETHODIMP XPC_MAP_CLASSNAME::GetScriptableFlags(PRUint32 *aFlags)
     XPC_MAP_FLAGS |
 #endif
     0;
-    return NS_OK;
 }
 
 /**************************************************************/

js/xpconnect/src/XPCWrappedNative.cpp

@@ -1012,11 +1012,7 @@ XPCWrappedNative::GatherProtoScriptableCreateInfo(nsIClassInfo* classInfo,
     if (classInfoHelper) {
         nsCOMPtr<nsIXPCScriptable> helper =
           dont_AddRef(static_cast<nsIXPCScriptable*>(classInfoHelper));
-        uint32_t flags;
-        nsresult rv = classInfoHelper->GetScriptableFlags(&flags);
-        if (NS_FAILED(rv))
-            flags = 0;
-
+        uint32_t flags = classInfoHelper->GetScriptableFlags();
         sciProto.SetCallback(helper.forget());
         sciProto.SetFlags(flags);
         sciProto.SetInterfacesBitmap(classInfoHelper->GetInterfacesBitmap());
@@ -1030,11 +1026,7 @@ XPCWrappedNative::GatherProtoScriptableCreateInfo(nsIClassInfo* classInfo,
     if (NS_SUCCEEDED(rv) && possibleHelper) {
         nsCOMPtr<nsIXPCScriptable> helper(do_QueryInterface(possibleHelper));
         if (helper) {
-            uint32_t flags;
-            rv = helper->GetScriptableFlags(&flags);
-            if (NS_FAILED(rv))
-                flags = 0;
-
+            uint32_t flags = helper->GetScriptableFlags();
             sciProto.SetCallback(helper.forget());
             sciProto.SetFlags(flags);
         }
@@ -1061,11 +1053,7 @@ XPCWrappedNative::GatherScriptableCreateInfo(nsISupports* obj,
     // Do the same for the wrapper specific scriptable
     nsCOMPtr<nsIXPCScriptable> helper(do_QueryInterface(obj));
     if (helper) {
-        uint32_t flags;
-        nsresult rv = helper->GetScriptableFlags(&flags);
-        if (NS_FAILED(rv))
-            flags = 0;
-
+        uint32_t flags = helper->GetScriptableFlags();
         sciWrapper.SetCallback(helper.forget());
         sciWrapper.SetFlags(flags);
 
@@ -3824,12 +3812,7 @@ ConstructSlimWrapper(XPCCallContext &ccx,
     nsISupports *identityObj = aHelper.GetCanonical();
     nsXPCClassInfo *classInfoHelper = aHelper.GetXPCClassInfo();
 
-    uint32_t flagsInt;
-    nsresult rv = classInfoHelper->GetScriptableFlags(&flagsInt);
-    if (NS_FAILED(rv))
-        flagsInt = 0;
-
-    XPCNativeScriptableFlags flags(flagsInt);
+    XPCNativeScriptableFlags flags(classInfoHelper->GetScriptableFlags());
 
     NS_ASSERTION(flags.DontAskInstanceForScriptable(),
                  "Not supported for cached wrappers!");
@@ -3843,7 +3826,7 @@ ConstructSlimWrapper(XPCCallContext &ccx,
     }
 
     JSObject* plannedParent = parent;
-    rv = classInfoHelper->PreCreate(identityObj, ccx, parent, &parent);
+    nsresult rv = classInfoHelper->PreCreate(identityObj, ccx, parent, &parent);
     if (rv != NS_SUCCESS_ALLOW_SLIM_WRAPPERS) {
         SLIM_LOG_NOT_CREATED(ccx, identityObj, "PreCreate hook refused");
 

js/xpconnect/src/xpcObjectHelper.h

@@ -102,12 +102,8 @@ public:
         // We should have something by now.
         MOZ_ASSERT(sinfo);
 
-        // Grab the flags. This should not fail.
-        PRUint32 flags;
-        mozilla::DebugOnly<nsresult> rv = sinfo->GetScriptableFlags(&flags);
-        MOZ_ASSERT(NS_SUCCEEDED(rv));
-
-        return flags;
+        // Grab the flags.
+        return sinfo->GetScriptableFlags();
     }
 
     nsWrapperCache *GetWrapperCache()