Fix button color on Android to match Ash

Source/core/rendering/RenderThemeChromiumAndroid.cpp

Index: Source/core/rendering/RenderThemeChromiumAndroid.cpp
diff --git a/Source/core/rendering/RenderThemeChromiumAndroid.cpp b/Source/core/rendering/RenderThemeChromiumAndroid.cpp
index 40ac2514c33f0900ba56426a3c055bb27af182a2..56740b7d9106606b91c9cca9566aa667c72b64cf 100644
--- a/Source/core/rendering/RenderThemeChromiumAndroid.cpp
+++ b/Source/core/rendering/RenderThemeChromiumAndroid.cpp
@@ -58,16 +58,6 @@ RenderThemeChromiumAndroid::~RenderThemeChromiumAndroid()
 {
 }
 
-Color RenderThemeChromiumAndroid::systemColor(CSSValueID cssValueId) const
-{
-    if (isRunningLayoutTest() && cssValueId == CSSValueButtonface) {
-        // Match Linux button color in layout tests.
-        static const Color linuxButtonGrayColor(0xffdddddd);
-        return linuxButtonGrayColor;
-    }
-    return RenderTheme::systemColor(cssValueId);
-}
-
 String RenderThemeChromiumAndroid::extraMediaControlsStyleSheet()
 {
     return String(mediaControlsAndroidUserAgentStyleSheet, sizeof(mediaControlsAndroidUserAgentStyleSheet));