Always report maybe-clipped when painting fragmented content

third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp b/third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp
index 8a89c97e9dbbf146a6e77fc26514ed2a35aca256..31dc0bcfea2449cfd973ffb4b74a516b5d6de459 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp
@@ -452,7 +452,8 @@ void PaintController::CopyCachedSubsequence(size_t begin_index,
     DCHECK(!IsCheckingUnderInvalidation());
     under_invalidation_checking_begin_ = begin_index;
     under_invalidation_message_prefix_ =
-        "(In cached subsequence of " + cached_item->Client().DebugName() + ")";
+        "(In cached subsequence starting with " +
+        cached_item->Client().DebugName() + ")";
   }
 
   Vector<PaintChunk>::const_iterator cached_chunk;