Revert of Blink doesn't honor percent heights on children of "align-self:stretch" flex items in a fixed-height

Revert of Blink doesn't honor percent heights on children of "align-self:stretch" flex items in a fixed-height (patchset #20 id:380001 of https://codereview.chromium.org/331203002/)

Reason for revert:
The patch broke a canvas with forced height in DevTools. See crbug.com/418591

Original issue's description:
> Blink doesn't honor percent heights on children of "align-self:stretch" flex items in a fixed-height flex container
>     
> Blink does not honor percent heights on children of flex items
> having align-self:stretch in a fixed-height flex container. It
> ignores the height specified in percent and take the height as
> min-content height.
>     
> This bug occurs because while applying stretch alignment to the flex-item
> we set the OverrideLogicalContentHeight for the flex-item but while
> computing PercentageLogicalHeight for the children of the flex-item
> in the api RenderBox::computePercentageLogicalHeight we are checking for
> hasOverrideContainingBlockLogicalHeight() which checks if the child which
> is having percentage height has overrideLogicalHeight or not. Since for
> the child we had not set overideLogicalHeight so this condtion returns
> false and available height for child becomes -1. Hence it takes height
> as min-content height.
>     
> This patch fixes this bug by using overrideLogicalContentHeight() of 
> containing block as availableHeight while computing the 
> percentage heights of children of flex item having stretch alignment. 
> Also for the cases where desiredLogicalHeight == logicalHeight() and 
> flex item hasPercentHeightDescendants() we are forcing a relayout
> of the flex item as overrideLogicalContentHeight() 
> gets cleared off while calculating preferredMainAxisContentExtentForChild
>     
> BUG=341310, 346275
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182735

TBR=a.bah@chromium.org,cbiesinger@chromium.org,leviw@chromium.org,tony@chromium.org,harpreet.sk@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=341310, 346275
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182850

[alph, 2014-09-29 16:11:00]

Created Revert of Blink doesn't honor percent heights on children of
"align-self:stretch" flex items in a fixed-height