Merge 142866

Merge 142866
> [Text Autosizing] Process narrow descendants with the same multiplier for the font size.
> https://bugs.webkit.org/show_bug.cgi?id=109573
> 
> Source/WebCore:
> 
> Patch by Anton Vayvod <avayvod@chromium.org>; on 2013-02-14
> Reviewed by Julien Chaffraix.
> 
> Combine narrow descendants of the same autosizing cluster into a group that is autosized
> with the same multiplier.
> 
> For example, on sites with a sidebar, sometimes the paragraphs next to the sidebar will have
> a large margin individually applied (via a CSS selector), causing them all to individually
> appear narrower than their enclosing blockContainingAllText. Rather than making each of
> these paragraphs into a separate cluster, we want them all to share the same multiplier, as
> if they were a single cluster.
> 
> Test: fast/text-autosizing/narrow-descendants-combined.html
> 
> * rendering/TextAutosizer.cpp:
> (WebCore::TextAutosizer::processClusterInternal):
> 
>     Common implementation for processCluster() and processCompositeCluster that accepts the
>     text width and whether the cluster should be autosized as parameters instead of
>     calculating it inline.
> 
> (WebCore::TextAutosizer::processCluster):
> 
>     Calculates the text width for a single cluster and whether it should be autosized, then
>     calls processClusterInternal() to apply the multiplier and process the cluster's
>     descendants.
> 
> (WebCore::TextAutosizer::processCompositeCluster):
> 
>     Calculates the text width for a group of renderers and if the group should be autosized,
>     then calls processClusterInternal() repeatedly with the same multiplier to apply it and
>     process all the descendants of the group.
> 
> (WebCore::TextAutosizer::clusterShouldBeAutosized):
> 
>     Calls the multiple renderers version to avoid code duplication.
> 
> (WebCore::TextAutosizer::compositeClusterShouldBeAutosized):
> 
>     The multiple renderers version of clusterShouldBeAutosized.
> 
> * rendering/TextAutosizer.h:
> 
>     Updated method declarations.
> 
> LayoutTests:
> 
> Test to verify that all narrow descendants of a cluster are autosized with the same
> multiplier.
> 
> Patch by Anton Vayvod <avayvod@chromium.org>; on 2013-02-14
> Reviewed by Julien Chaffraix.
> 
> * fast/text-autosizing/narrow-descendants-combined-expected.html: Added.
> * fast/text-autosizing/narrow-descendants-combined.html: Added.

TBR=commit-queue@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=143930

[Peter Beverloo, 2013-02-25 16:50:38]

Committed patchset #1 manually as r143930.