Move rendering/RenderImage* to layout/LayoutImage*

LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt

Index: LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt
diff --git a/LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt b/LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt
index 6c03b74d994a8f41de08efe083b090d34fed8508..48013bef7af10998ebd8c676e3efc3da5b04c4f7 100644
--- a/LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt
+++ b/LayoutTests/platform/mac/editing/pasteboard/drag-image-to-contenteditable-in-iframe-expected.txt
@@ -8,7 +8,7 @@ layer at (0,0) size 800x600
           text run at (0,0) width 762: "This tests that we can drag an image into the last position of a content editable div in an iframe that already contains an"
           text run at (0,18) width 159: "image, without crashing."
       RenderBlock (anonymous) at (0,52) size 784x158
-        RenderImage {IMG} at (0,51) size 76x103
+        LayoutImage {IMG} at (0,51) size 76x103
         RenderText {#text} at (76,140) size 4x18
           text run at (76,140) width 4: " "
         RenderText {#text} at (0,0) size 0x0
@@ -22,9 +22,9 @@ layer at (88,60) size 304x154
         RenderBody {BODY} at (8,8) size 284x134
           RenderBlock {DIV} at (0,0) size 271.80x129.30 [border: (1px solid #000000)]
             RenderBlock {IMG} at (1,84) size 20x20
-            RenderImage {IMG} at (21,1) size 76x103
+            LayoutImage {IMG} at (21,1) size 76x103
     layer at (9,92) size 20x20 clip at (10,93) size 18x18
       RenderBlock {DIV} at (0,0) size 20x20 [border: (1px solid #C0C0C0)]
-        RenderImage {IMG} at (2,2) size 16x16
+        LayoutImage {IMG} at (2,2) size 16x16
     layer at (27,94) size 0x0
       RenderBlock {DIV} at (18,2) size 0x0