Changed the default value for Empty Dir Attribute

third_party/WebKit/Source/core/html/HTMLElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLElement.cpp b/third_party/WebKit/Source/core/html/HTMLElement.cpp
index bc3c1bd86be98f88dc2d7ee1f7e9544a13ba772f..090d095dc9c05ba2d3c1880d06541ea4e77c95a2 100644
--- a/third_party/WebKit/Source/core/html/HTMLElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLElement.cpp
@@ -232,10 +232,13 @@ void HTMLElement::collectStyleForPresentationAttribute(const QualifiedName& name
         if (equalIgnoringCase(value, "auto")) {
             addPropertyToPresentationAttributeStyle(style, CSSPropertyUnicodeBidi, unicodeBidiAttributeForDirAuto(this));
         } else {
-            if (isValidDirAttribute(value))
+            if (isValidDirAttribute(value)) {
                 addPropertyToPresentationAttributeStyle(style, CSSPropertyDirection, value);
-            else
-                addPropertyToPresentationAttributeStyle(style, CSSPropertyDirection, "ltr");
+            } else {

[chakshu, 2016/02/11 05:55:37]

@kojii Can you look at this fix for default value for invalid dir attribute, as
per the discussion we had?

+                addPropertyToPresentationAttributeStyle(style, CSSPropertyDirection, "");
+                if (hasTagName(bodyTag))

[kojii, 2016/02/11 13:51:16]

Probably isHTMLBodyElement() is better? I'm not certain how practically it
differs though.

Also, minor, but this code adds CSSPropertyDirection twice if body. Better to
add only once.

[chakshu, 2016/02/12 06:04:10]

isHTMLBodyElement() is basically the wrapper function for hasTagName(bodyTag) so
yeah, it is better to use it but practically it does not differ though. Fixed
the changes asked for.

+                    addPropertyToPresentationAttributeStyle(style, CSSPropertyDirection, "ltr");
+            }
             if (!hasTagName(bdiTag) && !hasTagName(bdoTag) && !hasTagName(outputTag))
                 addPropertyToPresentationAttributeStyle(style, CSSPropertyUnicodeBidi, CSSValueIsolate);
         }