touch: Request focus when a touch-sequence starts.

BUG=focusing the omnibox, then touching a textfield in a webpage shows the
keyboard, but keys don't go to the textfield.
TEST=see bug

Review URL: http://codereview.chromium.org/6312009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71997 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/renderer_host/render_widget_host_view_views.cc

@@ -688,6 +688,9 @@ views::View::TouchStatus RenderWidgetHostViewViews::OnTouchEvent(
         if (touch_event_.touchPointsLength == 1) {
           // A new touch sequence has started.
           status = TOUCH_STATUS_START;
+
+          // We also want the focus.
+          RequestFocus();
         }
       }
       break;