Implement put_accvalue for textfields and location bar.

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index 4b2dbd2e88f0ae63b660051489ca93acfe3f9197..a49a20a29d278311abc3479bc907830c8e3ee1b8 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -1300,6 +1300,10 @@ void LocationBarView::PaintPageActionBackgrounds(gfx::Canvas* canvas) {
   }
 }
 
+void LocationBarView::AccessibilitySetValue(const string16& new_value) {
+  location_entry_->SetUserText(new_value);
+}
+
 const char* LocationBarView::GetClassName() const {
   return kViewClassName;
 }
@@ -1341,6 +1345,9 @@ void LocationBarView::GetAccessibleState(ui::AccessibleViewState* state) {
   location_entry_->GetSelectionBounds(&entry_start, &entry_end);
   state->selection_start = entry_start;
   state->selection_end = entry_end;
+
+  state->set_value_callback =
+      base::Bind(&LocationBarView::AccessibilitySetValue, AsWeakPtr());
 }
 
 bool LocationBarView::HasFocus() const {