fix chrome 12px via .iconfont-size-under-12px() mixin

style/components/button.less

@@ -44,13 +44,9 @@
 
   &-menu {
     > .@{iconfont-css-prefix} {
-      font-size: @font-size-base;
-      font-size: ~"10px \9"; // ie8-9
-      .scale(0.83);
-
-      :root & {
-        font-size: @font-size-base; // reset ie9 and above
-      }
+      .iconfont-size-under-12px(10px);
+      position: relative;
+      top: -1px;
     }
   }
 

style/components/dialog/Dialog.less

@@ -53,15 +53,9 @@
       text-align: center;
       text-transform: none;
       text-rendering: auto;
-      // 更好地渲染字体
-      -webkit-font-smoothing: antialiased;
-      -webkit-text-stroke-width: 0px;
-      -moz-osx-font-smoothing: grayscale;
       width: 12px;
       height: 12px;
-      font-size: @font-size-base;
-      font-size: ~"10px \9"; // ie8-9
-      .scale(0.83);
+      .iconfont-size-under-12px(10px);
       line-height: 12px;
       color:#000;
       top:18px;

style/components/dropdown.less

@@ -124,8 +124,7 @@
 
 .@{dropdownPrefixCls}-link {
   .anticon-down {
-    font-size: ~"60% \9"; // ie8-9
-    .scale(0.6);
+    .iconfont-size-under-12px(7px);
     font-weight: bold;
     vertical-align: top;
   }

style/components/inputNumber.less

@@ -39,9 +39,7 @@
     position: absolute;
     width: 12px;
     height: 12px;
-    font-size: @font-size-base;
-    font-size: ~"8px \9"; // ie8-9
-    .scale(0.67);
+    .iconfont-size-under-12px(8px);
     right: 4px;
   }
 

style/components/select.less

@@ -35,9 +35,7 @@
     position: absolute;
     top: 1px;
     right: 1px;
-    font-size: @font-size-base;
-    font-size: ~"10px \9"; // ie8-9
-    .scale(0.83);
+    .iconfont-size-under-12px(10px);
     width: 26px;
     line-height: 26px;
 
@@ -175,9 +173,7 @@
       cursor: pointer;
       display: inline-block;
       font-weight: bold;
-      font-size: @font-size-base;
-      font-size: ~"8px \9"; // ie8-9
-      .scale(0.67);
+      .iconfont-size-under-12px(8px);
       padding: 0 0 0 4px;
       position: relative;
       top: -1px;

style/components/steps.less

@@ -189,9 +189,7 @@
       font-size: 12px;
       margin-right: 10px;
       > .@{stepsPrefixClass}-icon.anticon {
-        font-size: 12px;
-        font-size: ~"9px \9"; // ie8-9
-        .scale(0.75);
+        .iconfont-size-under-12px(9px);
         top: -1px;
       }
     }

style/components/table.less

@@ -26,8 +26,7 @@
       margin-left: 4px;
       position: relative;
       top: -1px;
-      font-size: ~"10px \9"; // ie8-9
-      .scale(0.83);
+      .iconfont-size-under-12px(10px);
       cursor: pointer;
       color: #aaa;
       transition: all 0.3s ease;
@@ -45,12 +44,7 @@
         padding: 7px 8px;
         &.ant-dropdown-menu-item-selected:after {
           right: 8px;
-          font-size: @font-size-base;
-          font-size: ~"10px \9"; // ie8-9
-          .scale(0.83);
-          :root & {
-            font-size: @font-size-base; // reset ie9 and above
-          }
+          .iconfont-size-under-12px(10px);
         }
       }
     }
@@ -178,8 +172,7 @@
     }
     .anticon-caret-up,
     .anticon-caret-down {
-      font-size: ~"6px \9"; // ie8-9
-      .scale(0.5);
+      .iconfont-size-under-12px(6px);
       line-height: 6px;
       height: 6px;
       color: #aaa;

style/mixins/compatibility.less

@@ -3,4 +3,16 @@
 // rotate for ie8 and blow
 .ie-rotate(@rotation) {
   filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation);
-}
+}
+
+// for iconfont font size
+// fix chrome 12px bug, support ie
+.iconfont-size-under-12px(@iconfontSize) {
+  @font-scale: unit(@iconfontSize/@font-size-base);
+  font-size: @font-scale;
+  font-size: ~"@{iconfontSize} \9"; // ie8-9
+  .scale(@font-scale);
+  :root & {
+    font-size: @font-size-base; // reset ie9 and above
+  }
+}