Introduce isHTMLAnchorElement and toHTMLAnchorElement

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index a08b09ea579df1363cce8c85ad388e62bab2db78..7a89c530f22cd28b1aef7c369537a23d1ddd02f3 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -33,6 +33,7 @@
 #include "core/editing/EditingBoundary.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/htmlediting.h"
+#include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Frame.h"
@@ -2860,8 +2861,7 @@ void RenderObject::getTextDecorationColors(int decorations, Color& underline, Co
         curr = curr->parent();
         if (curr && curr->isAnonymousBlock() && toRenderBlock(curr)->continuation())
             curr = toRenderBlock(curr)->continuation();
-    } while (curr && decorations && (!quirksMode || !curr->node() ||
-                                     (!curr->node()->hasTagName(aTag) && !curr->node()->hasTagName(fontTag))));
+    } while (curr && decorations && (!quirksMode || !curr->node() || (!isHTMLAnchorElement(curr->node()) && !curr->node()->hasTagName(fontTag))));
 
     // If we bailed out, use the element we bailed out at (typically a <font> or <a> element).
     if (decorations && curr) {