History: Use images instead of unicode characters.

chrome/browser/resources/history/history.html

Index: chrome/browser/resources/history/history.html
diff --git a/chrome/browser/resources/history/history.html b/chrome/browser/resources/history/history.html
index a4a0f13be579ab0949905a870df44e5819968d07..8609b1792fd0f19e902457c322739f29c9414a58 100644
--- a/chrome/browser/resources/history/history.html
+++ b/chrome/browser/resources/history/history.html
@@ -50,8 +50,12 @@
   <div id="filter-controls" hidden>
     <button id="range-today" i18n-content="rangetoday" disabled>
     </button>
-    <button id="range-previous" disabled>◀</button>
-    <button id="range-next" disabled>▶</button>
+    <button id="range-previous" disabled>

[James Hawkins, 2013/02/07 19:37:29]

Is it styled differently when disabled?

[Sergiu, 2013/02/08 10:01:17]

Yes, the background on the button is slightly more washed out when it is
disabled.

+      <img src="../triangle_small_right.png" i18n-values="alt:rangeprevious">
+    </button>
+    <button id="range-next" disabled>
+      <img src="../triangle_small_right.png" i18n-values="alt:rangenext">
+    </button>
     <div id="display-filter-controls">
       <label>
         <input type="checkbox" id="display-filter-sites" name="display-filter">