Implement ::placeholder CSS selector.

third_party/WebKit/LayoutTests/platform/mac/fast/forms/textarea/textarea-placeholder-pseudo-style-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac/fast/forms/textarea/textarea-placeholder-pseudo-style-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac/fast/forms/textarea/textarea-placeholder-pseudo-style-expected.txt b/third_party/WebKit/LayoutTests/platform/mac/fast/forms/textarea/textarea-placeholder-pseudo-style-expected.txt
deleted file mode 100644
index d992f8441b967b44257387b3ad54649b03d6e9ef..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/platform/mac/fast/forms/textarea/textarea-placeholder-pseudo-style-expected.txt
+++ /dev/null
@@ -1,39 +0,0 @@
-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  LayoutBlockFlow {HTML} at (0,0) size 800x600
-    LayoutBlockFlow {BODY} at (8,8) size 784x584
-      LayoutText {#text} at (0,0) size 336x18
-        text run at (0,0) width 336: "This tests that you can set the placeholder text color."
-      LayoutBR {BR} at (335,14) size 1x0
-      LayoutText {#text} at (141,36) size 4x18
-        text run at (141,36) width 4: " "
-      LayoutText {#text} at (286,36) size 4x18
-        text run at (286,36) width 4: " "
-      LayoutText {#text} at (431,36) size 4x18
-        text run at (431,36) width 4: " "
-      LayoutText {#text} at (0,0) size 0x0
-layer at (8,26) size 141x32 clip at (9,27) size 139x30
-  LayoutTextControl {TEXTAREA} at (0,18) size 141x32 [bgcolor=#FFFFFF] [border: (1px solid #000000)]
-    LayoutBlockFlow {DIV} at (3,3) size 135x13 [color=#640000]
-      LayoutText {#text} at (0,0) size 20x13
-        text run at (0,0) width 20: "text"
-    LayoutBlockFlow {DIV} at (3,3) size 135x13
-layer at (153,26) size 141x32 clip at (154,27) size 139x30
-  LayoutTextControl {TEXTAREA} at (145,18) size 141x32 [color=#545454] [bgcolor=#FFFFFF] [border: (1px solid #545454)]
-    LayoutBlockFlow {DIV} at (3,3) size 135x13 [color=#640000]
-      LayoutText {#text} at (0,0) size 67x13
-        text run at (0,0) width 67: "disabled text"
-    LayoutBlockFlow {DIV} at (3,3) size 135x13
-layer at (298,26) size 141x32 clip at (299,27) size 139x30
-  LayoutTextControl {TEXTAREA} at (290,18) size 141x32 [bgcolor=#FFFFFF] [border: (1px solid #000000)]
-    LayoutBlockFlow {DIV} at (3,3) size 135x13 [color=#A9A9A9]
-      LayoutText {#text} at (0,0) size 37x13
-        text run at (0,0) width 37: "default"
-    LayoutBlockFlow {DIV} at (3,3) size 135x13
-layer at (443,26) size 141x32 clip at (444,27) size 139x30
-  LayoutTextControl {TEXTAREA} at (435,18) size 141x32 [color=#545454] [bgcolor=#FFFFFF] [border: (1px solid #545454)]
-    LayoutBlockFlow {DIV} at (3,3) size 135x13 [color=#A9A9A9]
-      LayoutText {#text} at (0,0) size 84x13
-        text run at (0,0) width 84: "default disabled"
-    LayoutBlockFlow {DIV} at (3,3) size 135x13