Implement people search.

chrome/browser/ui/app_list/search/common/webservice_search_provider.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/app_list/search/common/webservice_search_provider.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/strings/string_util.h"
+#include "chrome/browser/search/search.h"
 #include "chrome/common/url_constants.h"
 #include "url/gurl.h"
 
 namespace app_list {
 
 namespace {
 
 const int kWebserviceQueryThrottleIntrevalInMs = 100;
+const size_t kMinimumQueryLength = 3u;
 
 }  // namespace
 
-WebserviceSearchProvider::WebserviceSearchProvider() : use_throttling_(true) {}
+WebserviceSearchProvider::WebserviceSearchProvider(Profile* profile)
+    : profile_(profile), use_throttling_(true) {}
 
 WebserviceSearchProvider::~WebserviceSearchProvider() {}
 
 void WebserviceSearchProvider::StartThrottledQuery(
     const base::Closure& start_query) {
   base::TimeDelta interval =
       base::TimeDelta::FromMilliseconds(kWebserviceQueryThrottleIntrevalInMs);
   if (!use_throttling_ || base::Time::Now() - last_keytyped_ > interval) {
     query_throttler_.Stop();
     start_query.Run();
   } else {
     query_throttler_.Start(FROM_HERE, interval, start_query);
   }
   last_keytyped_ = base::Time::Now();
 }
 
+bool WebserviceSearchProvider::IsValidQuery(const string16& query) {
+  // If |query| contains sensitive data, bail out and do not create the place
+  // holder "search-web-store" result.
+  if (IsSensitiveInput(query) ||
+      (query.size() < kMinimumQueryLength) ||
+      !chrome::IsSuggestPrefEnabled(profile_)) {
+    return false;
+  }
+
+  return true;
+}
+
 // Returns whether or not the user's input string, |query|, might contain any
 // sensitive information, based purely on its value and not where it came from.
 bool WebserviceSearchProvider::IsSensitiveInput(const string16& query) {
   const GURL query_as_url(query);
   if (!query_as_url.is_valid())
     return false;
 
   // The input can be interpreted as a URL. Check to see if it is potentially
   // sensitive. (Code shamelessly copied from search_provider.cc's
   // IsQuerySuitableForSuggest function.)
@@ skipping 23 matching lines @@
   // specific path may reveal private information.
   if (LowerCaseEqualsASCII(query_as_url.scheme(), content::kHttpsScheme) &&
       !query_as_url.path().empty() && query_as_url.path() != "/") {
     return true;
   }
 
   return false;
 }
 
 }  // namespace app_list