backport.patch

From 0ae9d7914b44353fdc90c8dff0ef174e91d9f475 Mon Sep 17 00:00:00 2001
From: Jiang Jiang <[email protected]>
Date: Wed, 3 Dec 2014 16:43:47 +0100
Subject: [PATCH] DNA-30730: Backport WebKit patch to fix input button paddings

It's a backport of the following patch by [email protected]:

Subpixel Layout: Align <input type="button", submit> etc (PushButtonPart) top and bottom paddings with <button>

https://bugs.webkit.org/show_bug.cgi?id=127640
Reviewed by Simon Fraser.

<button> sets padding-top: 2px and padding-bottom: 3px as default values (html.css),
while <input type="button" (submit, etc) has the hardcoded values of 0, 0 and we center the text using the available space.
This results in different baseline text position in normal cases. This adjustment puts the <input type='button'
rendering back to the pre-subpixel layout state.
---
 third_party/WebKit/Source/platform/mac/ThemeMac.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/third_party/WebKit/Source/platform/mac/ThemeMac.mm b/third_party/WebKit/Source/platform/mac/ThemeMac.mm
index bf3d483..1a4c401 100644
--- a/third_party/WebKit/Source/platform/mac/ThemeMac.mm
+++ b/third_party/WebKit/Source/platform/mac/ThemeMac.mm
@@ -658,7 +658,7 @@ LengthBox ThemeMac::controlPadding(ControlPart part, const FontDescription& font
             // This also guarantees the HTML <button> will match our rendering by default, since we're using a consistent
             // padding.
             const int padding = 8 * zoomFactor;
-            return LengthBox(0, padding, 0, padding);
+            return LengthBox(2, padding, 3, padding);
         }
         default:
             return Theme::controlPadding(part, fontDescription, zoomedBox, zoomFactor);
-- 
2.1.0