Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/renderer/searchbox/searchbox_extension.cc

Index: chrome/renderer/searchbox/searchbox_extension.cc
diff --git a/chrome/renderer/searchbox/searchbox_extension.cc b/chrome/renderer/searchbox/searchbox_extension.cc
index 3482ab6b48077e6b72989b896dce1635fc7c752e..338dd9975e90c78824004354952ce60950607fa6 100644
--- a/chrome/renderer/searchbox/searchbox_extension.cc
+++ b/chrome/renderer/searchbox/searchbox_extension.cc
@@ -170,6 +170,9 @@ class SearchBoxExtensionWrapper : public v8::Extension {
   // restricted ID.
   static v8::Handle<v8::Value> NavigateContentWindow(const v8::Arguments& args);
 
+  // Handle a focus or blur event in the web searchbox.
+  static v8::Handle<v8::Value> WebSearchBoxFocusChange(const v8::Arguments& args);
+
   // Sets ordered suggestions. Valid for current |value|.
   static v8::Handle<v8::Value> SetSuggestions(const v8::Arguments& args);
 
@@ -223,6 +226,8 @@ v8::Handle<v8::FunctionTemplate> SearchBoxExtensionWrapper::GetNativeFunction(
     return v8::FunctionTemplate::New(GetContext);
   if (name->Equals(v8::String::New("NavigateContentWindow")))
     return v8::FunctionTemplate::New(NavigateContentWindow);
+  if (name->Equals(v8::String::New("WebSearchBoxFocusChange")))
+    return v8::FunctionTemplate::New(WebSearchBoxFocusChange);
   if (name->Equals(v8::String::New("SetSuggestions")))
     return v8::FunctionTemplate::New(SetSuggestions);
   if (name->Equals(v8::String::New("SetQuerySuggestion")))
@@ -397,6 +402,17 @@ v8::Handle<v8::Value> SearchBoxExtensionWrapper::NavigateContentWindow(
 }
 
 // static
+v8::Handle<v8::Value> SearchBoxExtensionWrapper::WebSearchBoxFocusChange(
+    const v8::Arguments& args) {
+  content::RenderView* render_view = GetRenderView();
+  if (render_view && args.Length() == 1) {
+    SearchBox::Get(render_view)->OnWebSearchBoxFocusChange(
+        args[0]->BooleanValue());
+  }
+  return v8::Undefined();
+}
+
+// static
 v8::Handle<v8::Value> SearchBoxExtensionWrapper::SetSuggestions(
     const v8::Arguments& args) {
   DVLOG(1) << "SetSuggestions";