Update containtingIsolate to go back all the way to top isolate from current

Source/core/rendering/RenderBlockLineLayout.cpp

Index: Source/core/rendering/RenderBlockLineLayout.cpp
diff --git a/Source/core/rendering/RenderBlockLineLayout.cpp b/Source/core/rendering/RenderBlockLineLayout.cpp
index 5ecc8f9633d92837e3a8b41bbca34511682fe81a..1d11e1f9580f5413ec62fd859b8c07ffa4cb002f 100644
--- a/Source/core/rendering/RenderBlockLineLayout.cpp
+++ b/Source/core/rendering/RenderBlockLineLayout.cpp
@@ -1318,6 +1318,7 @@ static inline void constructBidiRunsForSegment(InlineBidiResolver& topResolver,
         // to take a RenderObject and do this logic there, but that would be a layering
         // violation for BidiResolver (which knows nothing about RenderObject).
         RenderInline* isolatedInline = toRenderInline(containingIsolate(startObj, currentRoot));
+        ASSERT(isolatedInline);

[igoroliveira, 2013/09/04 22:04:57]

ASSERT_WITH_SECURITY_IMPLICATION maybe?

[jww, 2013/09/04 22:37:26]

Done.

 
         InlineBidiResolver isolatedResolver;
         EUnicodeBidi unicodeBidi = isolatedInline->style()->unicodeBidi();