fixup! Spec: Define per-context contribution limits

spec.bs

@@ -583,6 +583,8 @@ steps. They return a [=boolean=]:
     not null, return true.
 1. If |preSpecifiedParams|' [=pre-specified report parameters/filtering ID max
     bytes=] is not the [=default filtering ID max bytes=], return true.
+1. If |preSpecifiedParams|' [=pre-specified report parameters/requested max
+    contributions=] is not null, return true.
 1. Return false.
 
 Note: If a context ID or non-default filtering ID max bytes was specified, a
@@ -735,8 +737,8 @@ null |timeout|:
             1. [=iteration/Break=].
     1. If |hasProcessedContribution| is false, [=list/append=] |contribution| to
         |mergedContributions|.
-1. Let |effectiveMaxContributions| be the result of [=determining the effective
-    max contributions=] with |preSpecifiedParams| and |api|.
+1. Let |effectiveMaxContributions| be the result of [=determining the max
+    contributions=] with |preSpecifiedParams| and |api|.
 1. Let |truncatedContributions| be a new [=list=].
 1. If |mergedContributions| has a [=list/size=] greater than
     |effectiveMaxContributions|:
@@ -819,7 +821,7 @@ perform the following steps. They return an [=aggregatable report=].
     :: |preSpecifiedParams|' [=pre-specified report parameters/filtering ID max
         bytes=]
     : [=aggregatable report/max contributions=]
-    :: The result of [=determining the effective max contributions=] with
+    :: The result of [=determining the max contributions=] with
         |preSpecifiedParams| and |api|.
     : [=aggregatable report/queued=]
     :: false
@@ -844,14 +846,14 @@ They return a [=moment=].
 </div>
 
 <div algorithm>
-To <dfn>determine the effective max contributions</dfn> given a [=pre-specified
-report parameters=] |preSpecifiedParams| and a [=context type=] |api|, perform
-the following steps. They return a positive integer that is [=set/contained=] in
-the [=valid maxContributions range=].
-1. Let |defaultMaxContributions| be [=default maxContributions by API=][|api|].
+To <dfn>determine the max contributions</dfn> given a [=pre-specified report
+parameters=] |preSpecifiedParams| and a [=context type=] |api|, perform the
+following steps. They return a positive integer that is [=set/contained=] in the
+[=valid maxContributions range=].
 1. Let |requestedMaxContributions| be |preSpecifiedParams|' [=pre-specified
     report parameters/requested max contributions=].
-1. If |requestedMaxContributions| is null, return |defaultMaxContributions|.
+1. If |requestedMaxContributions| is null, return [=default maxContributions by
+    API=][|api|].
 1. If |requestedMaxContributions| is greater than [=maximum maxContributions=],
     return [=maximum maxContributions=].
 1. Return |requestedMaxContributions|.