Rename/move counter rendering code to layout.

Source/core/core.gypi

Index: Source/core/core.gypi
diff --git a/Source/core/core.gypi b/Source/core/core.gypi
index 67b4085e39715f45b310f2ebe5a053bbbc0350d6..2f778579467d1cd6803664802a125601f07a8251 100644
--- a/Source/core/core.gypi
+++ b/Source/core/core.gypi
@@ -1364,6 +1364,10 @@
             'inspector/WorkerInspectorController.h',
             'inspector/WorkerRuntimeAgent.cpp',
             'inspector/WorkerRuntimeAgent.h',
+            'layout/CounterNode.cpp',
+            'layout/CounterNode.h',
+            'layout/LayoutCounter.cpp',
+            'layout/LayoutCounter.h',
             'layout/LayoutSlider.cpp',
             'layout/LayoutSlider.h',
             'layout/LayoutSliderContainer.cpp',
@@ -1651,8 +1655,6 @@
             'rendering/ClipRect.h',
             'rendering/ClipRects.h',
             'rendering/ClipRectsCache.h',
-            'rendering/CounterNode.cpp',
-            'rendering/CounterNode.h',
             'rendering/EllipsisBox.cpp',
             'rendering/EllipsisBox.h',
             'rendering/FilterEffectRenderer.cpp',
@@ -1697,8 +1699,6 @@
             'rendering/RenderButton.h',
             'rendering/RenderCombineText.cpp',
             'rendering/RenderCombineText.h',
-            'rendering/RenderCounter.cpp',
-            'rendering/RenderCounter.h',
             'rendering/RenderDeprecatedFlexibleBox.cpp',
             'rendering/RenderDeprecatedFlexibleBox.h',
             'rendering/RenderDetailsMarker.cpp',