Add a border radius property to inherit it from a parent in a fallback content

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

Index: third_party/WebKit/Source/core/html/HTMLImageFallbackHelper.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLImageFallbackHelper.cpp b/third_party/WebKit/Source/core/html/HTMLImageFallbackHelper.cpp
index 8994abc89d7d3e8b5f940a23debdd022b3592f41..a21b8940f7853c8b074b58feac1ae78c4af04d40 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageFallbackHelper.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLImageFallbackHelper.cpp
@@ -44,6 +44,7 @@ void HTMLImageFallbackHelper::createAltTextShadowTree(Element& element)
     container->setInlineStyleProperty(CSSPropertyDisplay, CSSValueInlineBlock);
     container->setInlineStyleProperty(CSSPropertyBoxSizing, CSSValueBorderBox);
     container->setInlineStyleProperty(CSSPropertyPadding, 1, CSSPrimitiveValue::UnitType::Pixels);
+    container->setInlineStyleProperty(CSSPropertyBorderRadius, AtomicString("inherit", AtomicString::ConstructFromLiteral));

[pdr., 2016/03/07 21:15:50]

How does the code in InlineFlowBox::nodeAtPoint relate to this change? Are these
separate changes or are they both required?

[Miyoung Shin(c), 2016/03/09 12:28:07]

Yes, we need both of them, because container(DIV) will be hit if we don't
inherit this property.

[pdr., 2016/03/21 05:26:10]

Does a test depend on this? both border-hittest.html and the new test
(border-hittest-with-image-fallback.html) pass without this patch, and without
this change.

[Miyoung Shin(c), 2016/03/29 22:49:40]

The new test(border-hittest-with-image-fallback.html will be failed without this
patch if we revert the patch at https://crrev.com/983693002 that made the early
return in InlineBox.cpp.

 
     RefPtrWillBeRawPtr<HTMLImageElement> brokenImage = HTMLImageElement::create(element.document());
     container->appendChild(brokenImage);