History: Add range navigation control for grouped visits

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 55d97a2bdb37611f38c58331bc55a70d73310f76..731752272b0b292816ce861e1dd895f4fcd4a5be 100644
--- a/chrome/browser/resources/history/history.html
+++ b/chrome/browser/resources/history/history.html
@@ -48,6 +48,10 @@
   </header>
 
   <div id="filter-controls" hidden>
+    <button id="range-today" i18n-content="rangetoday" disabled>
+    </button>
+    <button id="range-previous" disabled>◀</button>

[James Hawkins, 2013/01/28 17:48:15]

I'm not sure we should be embedding 'resources' like this in the HTML.  We need
to get a proper asset.

[Sergiu, 2013/01/30 16:09:39]

Putting an image here is pretty tricky as you need to style the whole button
(can't have two bacgkground-image). Since it's pretty important to have this in,
should I change the unicode characters to "next" and "previous" and fix this
later on?

+    <button id="range-next" disabled>▶</button>
     <div id="display-filter-controls">
       <label>
         <input type="checkbox" id="display-filter-sites" name="display-filter">