Remove remaining untriaged Mac 10.10 layout test failures

The remaining failures are due to font/anti-aliasing differences.

Bug: 509025
Change-Id: Ic2e568937228dfaf7f0cd138727131cf629ca40b
Reviewed-on: https://chromium-review.googlesource.com/847556Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526806}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1626,21 +1626,8 @@ crbug.com/501659 fast/xsl/xslt-missing-namespace-in-xslt.xml [ Failure ]
 crbug.com/501659 http/tests/security/xss-DENIED-xml-external-entity.xhtml [ Failure ]
 crbug.com/501659 fast/css/stylesheet-candidate-nodes-crash.xhtml [ Failure ]
 
-# Mac10.10-specific failures that still need triaging.
-# Form controls need rebaseline because of the default font change.
-# If you see wider INPUT elements or narrower TEXTAREA elements, you may do just
-# rebaseline. See crbug.com/508768#c6
-crbug.com/509025 [ Mac10.10 ] fast/css/css2-system-fonts.html [ Failure ]
-crbug.com/509025 [ Mac10.10 ] fast/forms/select/hidden-listbox.html [ Failure ]
-crbug.com/509025 [ Mac10.10 ] fast/forms/textarea/textarea-newline.html [ Failure ]
-
 crbug.com/545140 [ Mac10.10 Mac10.11 Retina Mac10.12 ] fast/encoding/denormalised-voiced-japanese-chars.html [ Failure ]
 
-crbug.com/509025 [ Mac10.10 ] fast/events/context-no-deselect.html [ Failure ]
-crbug.com/509025 [ Mac10.10 ] virtual/rootlayerscrolls/scrollbars/rtl/overflow-scroll-rtl.html [ Failure ]
-crbug.com/509025 [ Mac10.10 ] virtual/rootlayerscrolls/scrollbars/short-scrollbar.html [ Failure ]
-crbug.com/509025 [ Mac10.10 ] virtual/mouseevent_fractional/fast/events/context-no-deselect.html [ Failure ]
-
 crbug.com/621772 fast/forms/color/color-suggestion-picker-with-scrollbar-appearance.html [ Pass Failure ]
 crbug.com/652995 fast/forms/text/input-text-scroll-left-on-blur.html [ Pass Failure ]
 

third_party/WebKit/LayoutTests/platform/mac-mac10.10/fast/events/context-no-deselect-expected.txt

@@ -5,7 +5,6 @@ layer at (0,0) size 800x600
     LayoutBlockFlow {BODY} at (8,8) size 784x584
       LayoutTextControl {INPUT} at (0,0) size 131x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
       LayoutText {#text} at (0,0) size 0x0
-      LayoutText {#text} at (0,0) size 0x0
 layer at (11,11) size 125x13
   LayoutBlockFlow {DIV} at (3,3) size 125x13
     LayoutText {#text} at (0,0) size 89x13

third_party/WebKit/LayoutTests/platform/mac-mac10.10/fast/forms/select/hidden-listbox-expected.txt

@@ -7,8 +7,8 @@ layer at (0,0) size 800x600
         text run at (0,0) width 523: "This tests that the whole listbox control is hidden when visibility is set to hidden. "
       LayoutBR {BR} at (522,14) size 1x0
       LayoutText {#text} at (0,0) size 0x0
-hidden layer at (8,26) size 179x59 clip at (9,27) size 166x57 scrollHeight 56
-  LayoutListBox {SELECT} at (0,18.25) size 178.84x58.75 [bgcolor=#FFFFFF] [border: (1px solid #999999)]
-    LayoutBlockFlow {OPTION} at (1,1) size 165.84x14.19
-      LayoutText {#text} at (2,0) size 162x13
-        text run at (2,0) width 162: "This text should not be visible"
+hidden layer at (8,26) size 166x59 clip at (9,27) size 153x57
+  LayoutListBox {SELECT} at (0,18) size 165.67x58.75 [bgcolor=#FFFFFF] [border: (1px solid #999999)]
+    LayoutBlockFlow {OPTION} at (1,1) size 152.67x14.19
+      LayoutText {#text} at (2,0) size 149x13
+        text run at (2,0) width 149: "This text should not be visible"

third_party/WebKit/LayoutTests/platform/mac-mac10.10/virtual/mouseevent_fractional/fast/events/context-no-deselect-expected.txt

+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
+      LayoutTextControl {INPUT} at (0,0) size 131x19 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
+      LayoutText {#text} at (0,0) size 0x0
+layer at (11,11) size 125x13
+  LayoutBlockFlow {DIV} at (3,3) size 125x13
+    LayoutText {#text} at (0,0) size 89x13
+      text run at (0,0) width 89: "some sample text"
+selection start: position 5 of child 0 {#text} of child 0 {DIV} of {#document-fragment} of child 1 {INPUT} of body
+selection end:   position 15 of child 0 {#text} of child 0 {DIV} of {#document-fragment} of child 1 {INPUT} of body