Fix not autosizing ruby elements issue.

third_party/WebKit/Source/core/layout/TextAutosizer.cpp

Index: third_party/WebKit/Source/core/layout/TextAutosizer.cpp
diff --git a/third_party/WebKit/Source/core/layout/TextAutosizer.cpp b/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
index af61f4ee062355a2a97ee95ee8ea791af24cea91..bb34db81bb7e1375f3aead92b792fc1cb442b535 100644
--- a/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
+++ b/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
@@ -30,6 +30,7 @@
 
 #include "core/layout/TextAutosizer.h"
 
+#include <memory>
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
@@ -41,6 +42,7 @@
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutListItem.h"
 #include "core/layout/LayoutListMarker.h"
+#include "core/layout/LayoutRubyRun.h"
 #include "core/layout/LayoutTable.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutView.h"
@@ -48,7 +50,6 @@
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/page/Page.h"
 #include "wtf/PtrUtil.h"
-#include <memory>
 
 #ifdef AUTOSIZING_DOM_DEBUG_INFO
 #include "core/dom/ExecutionContextTask.h"
@@ -400,6 +401,10 @@ void TextAutosizer::beginLayout(LayoutBlock* block,
   if (prepareForLayout(block) == StopLayout)
     return;
 
+  // Skip ruby's inner blocks, because these blocks already be inflated.

[pdr., 2017/02/10 04:10:46]

nit: "...these blocks already are inflated."

[cathiechentx, 2017/02/10 05:17:47]

Got it. Thank you :)

+  if (block->isRubyRun() || block->isRubyBase() || block->isRubyText())
+    return;
+
   ASSERT(!m_clusterStack.isEmpty() || block->isLayoutView());
 
   if (Cluster* cluster = maybeCreateCluster(block))
@@ -470,11 +475,20 @@ float TextAutosizer::inflate(LayoutObject* parent,
   bool hasTextChild = false;
 
   LayoutObject* child = nullptr;
-  if (parent->isLayoutBlock() &&
-      (parent->childrenInline() || behavior == DescendToInnerBlocks))
+  if (parent->isRuby()) {
+    // Skip layoutRubyRun which is inline-block.
+    // Inflate rubyRun's inner blocks.
+    LayoutObject* run = parent->slowFirstChild();
+    if (run && run->isRubyRun()) {
+      child = toLayoutRubyRun(run)->firstChild();
+      behavior = SkippedInlineBlockAndDescendToInnerBlocks;
+    }
+  } else if (parent->isLayoutBlock() &&
+             (parent->childrenInline() || behavior == DescendToInnerBlocks)) {
     child = toLayoutBlock(parent)->firstChild();
-  else if (parent->isLayoutInline())
+  } else if (parent->isLayoutInline()) {
     child = toLayoutInline(parent)->firstChild();
+  }
 
   while (child) {
     if (child->isText()) {
@@ -487,11 +501,15 @@ float TextAutosizer::inflate(LayoutObject* parent,
       applyMultiplier(child, multiplier, layouter);
 
       // FIXME: Investigate why MarkOnlyThis is sufficient.
-      if (parent->isLayoutInline())
+      // If inlineBlocks have been skipped, we should use MarkContainerChain
+      // here.
+      if (behavior == SkippedInlineBlockAndDescendToInnerBlocks)

[pdr., 2017/02/10 04:10:46]

Nit: setPreferredLogicalWidthsDirty has lost its comment. I'd recommend
something like:
if (behavior == SkippedInlineBlockAndDescendToInnerBlocks) {
  child->setPreferredLogicalWidthsDirty();
} else if (parent->isLayoutInline()) {
  // FIXME: Investigate why MarkOnlyThis is sufficient.
  child->setPreferredLogicalWidthsDirty(MarkOnlyThis);
}

Btw: I looked into this a little and I think we might just be able to remove
MarkOnlyThis. It was added in https://codereview.chromium.org/218863002 but no
tests fail if it's removed. Would removing that and always using
MarkContainerChain make this patch simpler? I.e., could you just set behavior =
DescendToInnerBlocks for ruby instead of setting it to
SkippedInlineBlockAndDescendToInnerBlocks?

[cathiechentx, 2017/02/10 05:17:47]

yes, it's much simpler. But rubyText is a block;(
    rubyrun
        rubyBase(block)
            inline(<rb>)
                text
        rubyText(block)
            text(parent is block)

How about this?
if (behavior == DescendToInnerBlocks)
  child->setPreferredLogicalWidthsDirty();
else if (parent->isLayoutInline())
  child->setPreferredLogicalWidthsDirty(MarkOnlyThis);

It will make table stuff setPreferredLogicalWidthsDirty too, but I think it's
reasonable.

[pdr., 2017/02/10 19:27:09]

Yeah, something like that seems good (just don't forget to keep the comment "//
FIXME: Investigate why MarkOnlyThis is sufficient.")

+        child->setPreferredLogicalWidthsDirty(MarkContainerChain);
+      else if (parent->isLayoutInline())
         child->setPreferredLogicalWidthsDirty(MarkOnlyThis);
     } else if (child->isLayoutInline()) {
       multiplier = inflate(child, layouter, behavior, multiplier);
-    } else if (child->isLayoutBlock() && behavior == DescendToInnerBlocks &&
+    } else if (child->isLayoutBlock() && behavior >= DescendToInnerBlocks &&
                !classifyBlock(child,
                               INDEPENDENT | EXPLICIT_WIDTH | SUPPRESSING)) {
       multiplier = inflate(child, layouter, behavior, multiplier);