Don't return installed apps in webstore searches in Launcher

chrome/browser/ui/app_list/search/webstore/webstore_result.cc

Index: chrome/browser/ui/app_list/search/webstore/webstore_result.cc
diff --git a/chrome/browser/ui/app_list/search/webstore/webstore_result.cc b/chrome/browser/ui/app_list/search/webstore/webstore_result.cc
index 2f0dfe8e5142023ce9bef644f862769cc8e68159..25c94df2b9e83c52cfb136d6938ad6b7ed4920a4 100644
--- a/chrome/browser/ui/app_list/search/webstore/webstore_result.cc
+++ b/chrome/browser/ui/app_list/search/webstore/webstore_result.cc
@@ -24,7 +24,6 @@
 #include "chrome/grit/generated_resources.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
-#include "extensions/common/extension.h"
 #include "extensions/common/extension_urls.h"
 #include "grit/theme_resources.h"
 #include "net/base/url_util.h"
@@ -48,7 +47,7 @@ WebstoreResult::WebstoreResult(Profile* profile,
       install_tracker_(NULL),
       extension_registry_(NULL),
       weak_factory_(this) {
-  set_id(extensions::Extension::GetBaseURLFromExtensionId(app_id_).spec());
+  set_id(GetResultIdFromExtensionId(app_id));
 
   SetDefaultDetails();
 
@@ -72,6 +71,12 @@ WebstoreResult::~WebstoreResult() {
   StopObservingRegistry();
 }
 
+// static
+std::string WebstoreResult::GetResultIdFromExtensionId(
+    const std::string& extension_id) {
+  return extension_urls::GetWebstoreItemDetailURLPrefix() + extension_id;
+}
+
 void WebstoreResult::Open(int event_flags) {
   RecordHistogram(SEARCH_WEBSTORE_SEARCH_RESULT);
   const GURL store_url = net::AppendQueryParameter(