Add onfocuschange to the Extended Search API, with associated isFocused attribute.

chrome/renderer/searchbox/searchbox.cc

Index: chrome/renderer/searchbox/searchbox.cc
diff --git a/chrome/renderer/searchbox/searchbox.cc b/chrome/renderer/searchbox/searchbox.cc
index d72a60cb974e1980cc468d7c80dacee9f005c40e..5130222bba2615eff921b21a6cb7a10048beb304 100644
--- a/chrome/renderer/searchbox/searchbox.cc
+++ b/chrome/renderer/searchbox/searchbox.cc
@@ -67,6 +67,7 @@ SearchBox::SearchBox(content::RenderView* render_view)
       is_key_capture_enabled_(false),
       display_instant_results_(false),
       omnibox_font_size_(0),
+      is_focused_(false),
       autocomplete_results_cache_(kMaxInstantAutocompleteResultItemCacheSize),
       most_visited_items_cache_(kMaxInstantMostVisitedItemCacheSize) {
 }
@@ -209,6 +210,8 @@ bool SearchBox::OnMessageReceived(const IPC::Message& message) {
                         OnFontInformationReceived)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxMostVisitedItemsChanged,
                         OnMostVisitedChanged)
+    IPC_MESSAGE_HANDLER(ChromeViewMsg_SearchBoxFocusChanged,
+                        OnFocusChanged)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -442,3 +445,11 @@ bool SearchBox::GetMostVisitedItemWithID(
   return most_visited_items_cache_.GetItemWithRestrictedID(most_visited_item_id,
                                                            item);
 }
+
+void SearchBox::OnFocusChanged(bool is_focused) {
+  is_focused_ = is_focused;
+  if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
+    extensions_v8::SearchBoxExtension::DispatchFocusChange(
+        render_view()->GetWebView()->mainFrame());
+  }
+}