[css3-flexbox] Try to fix the flex algo with aspect-ratio items, so you don't unnecessarily screw up the aspect ratio.

Author: tabatkins

css3-flexbox/Overview.html

@@ -3123,6 +3123,17 @@ <h3 id=line-sizing><span class=secno>9.2. </span> Line Length Determination</h3>
       constraint. The <a href="#flex-base-size"><i>flex base size</i></a> is
       the item's resulting main size.
 
+     <li> If the flex basis and cross size are both ‘<code
+      class=css>auto</code>’ , the flex container is single-line and has a
+      <a href="#definite-size"><i>definite</i></a> cross size, the flex item
+      has an intrinsic aspect ratio, and the flex item has ‘<code
+      class=css>align-self: stretch</code>’, the <a
+      href="#flex-base-size"><i>flex base size</i></a> is computed from the
+      flex container's inner cross size and the flex item's intrinsic aspect
+      ratio.
+      <p class=issue> This substep needs review, see thread at <a
+       href="http://lists.w3.org/Archives/Public/www-style/2012Oct/0781.html">http://lists.w3.org/Archives/Public/www-style/2012Oct/0781.html</a>.
+
      <li> Otherwise, if the flex basis is ‘<code class=css>auto</code>’
       or depends on its available size, the available main size is infinite,
       and the flex item's inline axis is parallel to the main axis, lay the
@@ -3237,6 +3248,8 @@ <h3 id=cross-sizing><span class=secno>9.4. </span> Cross size determination</h3>
     sizes is less than the flex container's inner cross size, increase the
     cross size of each flex line by equal amounts such that the sum of their
     cross sizes exactly equals the flex container's inner cross size.
+    <p class=note> Note that this step does not affect the main size of the
+     flex item, even if it has an intrinsic aspect ratio.
 
    <li id=algo-visibility> <strong>Collapse ‘<code
     class=css>visibility:collapse</code>’ items.</strong> If any flex items

css3-flexbox/Overview.src.html

@@ -2394,6 +2394,17 @@ <h3 id='line-sizing'>
 					size the item under that constraint.
 					The <i>flex base size</i> is the item's resulting main size.
 
+				<li>
+					If the flex basis and cross size are both ''auto'' ,
+					the flex container is single-line and has a <i>definite</i> cross size,
+					the flex item has an intrinsic aspect ratio,
+					and the flex item has ''align-self: stretch'',
+					the <i>flex base size</i> is computed from the flex container's inner cross size
+					and the flex item's intrinsic aspect ratio.
+
+					<p class='issue'>
+						This substep needs review, see thread at <a href="http://lists.w3.org/Archives/Public/www-style/2012Oct/0781.html">http://lists.w3.org/Archives/Public/www-style/2012Oct/0781.html</a>.
+
 				<li>
 					Otherwise,
 					if the flex basis is ''auto'' or depends on its available size,
@@ -2520,6 +2531,10 @@ <h3 id='cross-sizing'>
 			increase the cross size of each flex line by equal amounts
 			such that the sum of their cross sizes exactly equals the flex container's inner cross size.
 
+			<p class='note'>
+				Note that this step does not affect the main size of the flex item,
+				even if it has an intrinsic aspect ratio.
+
 		<li id='algo-visibility'>
 			<strong>Collapse ''visibility:collapse'' items.</strong>
 			If any flex items have ''visibility: collapse'',