Fix RGBA alpha parsing and serialization to adhere to W3 standard.

third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt
index d4a1faa3cecb88ac4b2ef1af9a1a156c0c78c2da..c1fb53a4a92f5d8c74b64487cde8bb7faa7228c8 100644
--- a/third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/linux/fast/borders/mixed-border-styles-expected.txt
@@ -3,40 +3,40 @@ layer at (0,0) size 800x600
 layer at (0,0) size 800x541
   LayoutBlockFlow {HTML} at (0,0) size 800x541
     LayoutBlockFlow {BODY} at (8,8) size 784x525
-      LayoutBlockFlow {DIV} at (10,10) size 150x150 [border: (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (10,10) size 150x150 [border: (50px solid #00000080)]
       LayoutText {#text} at (170,155) size 4x19
         text run at (170,155) width 4: " "
-      LayoutBlockFlow {DIV} at (184,10) size 150x150 [border: (50px solid #0000007F) (50px double #0000007F) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (184,10) size 150x150 [border: (50px solid #00000080) (50px double #00000080) (50px solid #00000080)]
       LayoutText {#text} at (344,155) size 4x19
         text run at (344,155) width 4: " "
-      LayoutBlockFlow {DIV} at (358,10) size 150x150 [border: (50px solid #0000007F) none (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (358,10) size 150x150 [border: (50px solid #00000080) none (50px solid #00000080)]
       LayoutText {#text} at (518,155) size 4x19
         text run at (518,155) width 4: " "
-      LayoutBlockFlow {DIV} at (532,10) size 150x150 [border: (50px solid #0000007F) (50px solid #00000000) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (532,10) size 150x150 [border: (50px solid #00000080) (50px solid #00000000) (50px solid #00000080)]
       LayoutText {#text} at (692,155) size 4x19
         text run at (692,155) width 4: " "
       LayoutBR {BR} at (0,0) size 0x0
-      LayoutBlockFlow {DIV} at (10,185) size 150x150 [border: (50px solid #0000007F) none (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (10,185) size 150x150 [border: (50px solid #00000080) none (50px solid #00000080)]
       LayoutText {#text} at (170,330) size 4x19
         text run at (170,330) width 4: " "
-      LayoutBlockFlow {DIV} at (184,185) size 150x150 [border: (50px solid #0000007F) none (50px solid #00000000) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (184,185) size 150x150 [border: (50px solid #00000080) none (50px solid #00000000) (50px solid #00000080)]
       LayoutText {#text} at (344,330) size 4x19
         text run at (344,330) width 4: " "
-      LayoutBlockFlow {DIV} at (358,185) size 150x150 [border: (50px solid #0000007F) none (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (358,185) size 150x150 [border: (50px solid #00000080) none (50px solid #00000080)]
       LayoutText {#text} at (518,330) size 4x19
         text run at (518,330) width 4: " "
-      LayoutBlockFlow {DIV} at (532,185) size 150x150 [border: (50px solid #0000007F) none (50px groove #0000007F) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (532,185) size 150x150 [border: (50px solid #00000080) none (50px groove #00000080) (50px solid #00000080)]
       LayoutText {#text} at (692,330) size 4x19
         text run at (692,330) width 4: " "
       LayoutBR {BR} at (0,0) size 0x0
-      LayoutBlockFlow {DIV} at (10,360) size 150x150 [border: (50px solid #0000007F) (50px double #0000007F) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (10,360) size 150x150 [border: (50px solid #00000080) (50px double #00000080) (50px solid #00000080)]
       LayoutText {#text} at (170,505) size 4x19
         text run at (170,505) width 4: " "
-      LayoutBlockFlow {DIV} at (184,360) size 150x150 [border: (50px solid #0000007F) none (50px double #0000007F) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (184,360) size 150x150 [border: (50px solid #00000080) none (50px double #00000080) (50px solid #00000080)]
       LayoutText {#text} at (344,505) size 4x19
         text run at (344,505) width 4: " "
-      LayoutBlockFlow {DIV} at (358,360) size 150x150 [border: (50px solid #0000007F) (50px solid #0080007F) (50px solid #0000007F)]
+      LayoutBlockFlow {DIV} at (358,360) size 150x150 [border: (50px solid #00000080) (50px solid #00800080) (50px solid #00000080)]
       LayoutText {#text} at (518,505) size 4x19
         text run at (518,505) width 4: " "
-      LayoutBlockFlow {DIV} at (532,360) size 150x150 [border: (50px solid #0000007F) (50px solid #0080007F) (50px solid #0000007F) (50px solid #0080007F)]
+      LayoutBlockFlow {DIV} at (532,360) size 150x150 [border: (50px solid #00000080) (50px solid #00800080) (50px solid #00000080) (50px solid #00800080)]
       LayoutText {#text} at (0,0) size 0x0