Meta: disambiguate focus() and blur() for Window and HTMLElement

Add data-dfn-for="" attributes as appropriate. This should help other
specs (in this case CSSOM View) cross-referencing these terms.

Also fixes a few cases where data-for="" should have been
data-dfn-for="".

source

@@ -73695,17 +73695,17 @@ END:VCARD</pre>
   <code>Document</code> object, when invoked, must return the result of running the <span>has focus
   steps</span> with the <code>Document</code> object as the argument.</p>
 
-  <p>The <dfn><code data-x="dom-window-focus">focus()</code></dfn> method on the <code>Window</code>
-  object, when invoked, must run the <span>focusing steps</span> with the <code>Window</code>
-  object's <span>browsing context</span>. Additionally, if this <span>browsing context</span> is a
-  <span>top-level browsing context</span>, user agents are encouraged to trigger some sort of
-  notification to indicate to the user that the page is attempting to gain focus.</p>
-
-  <p>The <dfn><code data-x="dom-window-blur">blur()</code></dfn> method on the <code>Window</code>
-  object, when invoked, provides a hint to the user agent that the script believes the user probably
-  is not currently interested in the contents of the <span>browsing context</span> of the
-  <code>Window</code> object on which the method was invoked, but that the contents might become
-  interesting again in the future.</p>
+  <p>The <dfn data-dfn-for="Window"><code data-x="dom-window-focus">focus()</code></dfn> method on
+  the <code>Window</code> object, when invoked, must run the <span>focusing steps</span> with the
+  <code>Window</code> object's <span>browsing context</span>. Additionally, if this <span>browsing
+  context</span> is a <span>top-level browsing context</span>, user agents are encouraged to trigger
+  some sort of notification to indicate to the user that the page is attempting to gain focus.</p>
+
+  <p>The <dfn data-dfn-for="Window"><code data-x="dom-window-blur">blur()</code></dfn> method on the
+  <code>Window</code> object, when invoked, provides a hint to the user agent that the script
+  believes the user probably is not currently interested in the contents of the <span>browsing
+  context</span> of the <code>Window</code> object on which the method was invoked, but that the
+  contents might become interesting again in the future.</p>
 
   <p>User agents are encouraged to ignore calls to this <code data-x="dom-window-blur">blur()</code>
   method entirely.</p>
@@ -73715,8 +73715,8 @@ END:VCARD</pre>
   system widget (e.g. tab or window) that contained the <span>browsing context</span>, but hostile
   sites widely abuse this behavior to the user's detriment.</p>
 
-  <p>The <dfn><code data-x="dom-focus">focus()</code></dfn> method on elements, when invoked, must
-  run the following algorithm:</p>
+  <p>The <dfn data-dfn-for="HTMLElement"><code data-x="dom-focus">focus()</code></dfn> method on
+  elements, when invoked, must run the following algorithm:</p>
 
   <ol>
 
@@ -73730,9 +73730,10 @@ END:VCARD</pre>
 
   </ol>
 
-  <p>The <dfn><code data-x="dom-blur">blur()</code></dfn> method, when invoked, should run the
-  <span>unfocusing steps</span> for the element on which the method was called. User agents may
-  selectively or uniformly ignore calls to this method for usability reasons.</p>
+  <p>The <dfn data-dfn-for="HTMLElement"><code data-x="dom-blur">blur()</code></dfn> method, when
+  invoked, should run the <span>unfocusing steps</span> for the element on which the method was
+  called. User agents may selectively or uniformly ignore calls to this method for usability
+  reasons.</p>
 
   <p class="example">For example, if the <code data-x="dom-blur">blur()</code> method is unwisely
   being used to remove the focus ring for aesthetics reasons, the page would become unusable by
@@ -93490,7 +93491,7 @@ dictionary <dfn>EventSourceInit</dfn> {
   <p>Each <code>EventSource</code> object has the following associated with it:</p>
 
   <ul>
-   <li><p>A <dfn data-x="concept-EventSource-url" data-for="EventSource">url</dfn> (a <span>URL
+   <li><p>A <dfn data-x="concept-EventSource-url" data-dfn-for="EventSource">url</dfn> (a <span>URL
    record</span>). Set during construction.</p></li>
 
    <li><p>A <dfn data-x="concept-event-stream-request">request</dfn>. This must initially be
@@ -96518,15 +96519,15 @@ interface <dfn>WorkerGlobalScope</dfn> : <span>EventTarget</span> {
   <div w-nodev>
 
   <p id="the-worker's-documents">A <code>WorkerGlobalScope</code> object has an associated <dfn
-  id="concept-WorkerGlobalScope-owner-set" data-export="" data-for="WorkerGlobalScope">owner
+  id="concept-WorkerGlobalScope-owner-set" data-export="" data-dfn-for="WorkerGlobalScope">owner
   set</dfn> (a <span>set</span> of <code>Document</code> and <code>WorkerGlobalScope</code>
   objects). It is initially empty and populated when the worker is created or obtained.</p>
 
   <p class="note">It is a <span>set</span>, instead of a single owner, to accomodate
   <code>SharedWorkerGlobalScope</code> objects.</p>
 
   <p>A <code>WorkerGlobalScope</code> object has an associated <dfn id="the-worker's-workers"
-  data-export="" data-for="WorkerGlobalScope">worker set</dfn> (a <span>set</span> of
+  data-export="" data-dfn-for="WorkerGlobalScope">worker set</dfn> (a <span>set</span> of
   <code>WorkerGlobalScope</code> objects). It is initially empty and populated when the worker
   creates or obtains further workers.</p>