Take continuation into consideration when calculating absoluteClippedOverflowRect.

Source/core/rendering/RenderInline.cpp

Index: Source/core/rendering/RenderInline.cpp
diff --git a/Source/core/rendering/RenderInline.cpp b/Source/core/rendering/RenderInline.cpp
index c58194d2ad32ddc5d13a81f8f7bb621b227e9832..cf914767ca8da3f9409bf69533a0319f45f59e01 100644
--- a/Source/core/rendering/RenderInline.cpp
+++ b/Source/core/rendering/RenderInline.cpp
@@ -1020,6 +1020,33 @@ LayoutRect RenderInline::linesVisualOverflowBoundingBox() const
     return rect;
 }
 
+LayoutRect RenderInline::absoluteClippedOverflowRect() const
+{
+    if (!continuation())
+        return clippedOverflowRectForPaintInvalidation(view());
+
+    FloatRect floatResult;
+    LinesBoundingBoxGeneratorContext context(floatResult);
+
+    RenderInline* endContinuation = inlineElementContinuation();
+    while (endContinuation->inlineElementContinuation())
+        endContinuation = endContinuation->inlineElementContinuation();
+
+    // Note the following algorithm is N^2 (if the continuation is N renderers and the averagae
+    // depth of those renderers is M, we'll visit N*M nodes). We can possibly do some optimizations,
+    // such as mapping all these rects into a common ancestor's address space then mapping the
+    // result into the view.
+    for (RenderBlock* currBlock = containingBlock(); currBlock && currBlock->isAnonymousBlock(); currBlock = toRenderBlock(currBlock->nextSibling())) {
+        for (RenderObject* curr = currBlock->firstChild(); curr; curr = curr->nextSibling()) {
+            LayoutRect rect = curr->clippedOverflowRectForPaintInvalidation(view());
+            context(FloatRect(enclosingIntRect(rect)));

[leviw_travelin_and_unemployed, 2015/01/20 20:19:24]

If you're eventually taking the enclosingIntRect of the result (on L1044), this
enclosingIntRect is extra work.

[c.shu, 2015/01/20 23:10:22]

Done.

+            if (curr == endContinuation)
+                return enclosingIntRect(floatResult);
+        }
+    }
+    return LayoutRect();
+}
+
 LayoutRect RenderInline::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     if ((!firstLineBoxIncludingCulling() && !continuation()) || style()->visibility() != VISIBLE)