third_party/WebKit: fix typos found in comments

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
index 71cd3e2c0ad0d0cc35f8595ea3ea9e767f3473ef..39f908c65fc104922ab956502cd0cd455fa069c5 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
@@ -600,7 +600,7 @@ void PaintLayerPainter::paintFragmentWithPhase(PaintPhase phase, const PaintLaye
     if (!paintingInfo.scrollOffsetAccumulation.isZero()) {
         // As a descendant of the root layer, m_paintLayer's painting is not controlled by the ScrollRecorders
         // created by BlockPainter of the ancestor layers up to the root layer, so we need to issue ScrollRecorder
-        // for this layer seperately, with the scroll offset accumulated from the root layer to the parent of this
+        // for this layer separately, with the scroll offset accumulated from the root layer to the parent of this
         // layer, to get the same result as ScrollRecorder in BlockPainter.
         paintOffset += paintingInfo.scrollOffsetAccumulation;