Add core plumbing for Instant Extended work

chrome/browser/google/google_util.cc

 // Copyright (c) 2012 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/google/google_util.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/string16.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/net/url_util.h"
 #include "chrome/installer/util/google_update_settings.h"
 #include "googleurl/src/gurl.h"
+#include "googleurl/src/url_parse.h"
 #include "net/base/registry_controlled_domain.h"
 
 #if defined(OS_MACOSX)
 #include "chrome/browser/mac/keystone_glue.h"
 #endif
 
 namespace {
 
 const char* brand_for_testing = NULL;
 
@@ skipping 165 matching lines @@
     return false;
 
   // Check for query parameter in URL parameter and hash fragment, depending on
   // the path type.
   std::string query(original_url.query());
   std::string ref(original_url.ref());
   return HasQueryParameter(ref) ||
       (!is_home_page_base && HasQueryParameter(query));
 }
 
+bool IsInstantExtendedAPIGoogleSearchUrl(const std::string& url) {
+  if (!IsGoogleSearchUrl(url))
+    return false;
+
+  const std::string embedded_search_key = "espv";
+
+  url_parse::Parsed parsed_url;
+  url_parse::ParseStandardURL(url.c_str(), url.length(), &parsed_url);
+  url_parse::Component key, value;
+  while (url_parse::ExtractQueryKeyValue(
+             url.c_str(), &parsed_url.query, &key, &value)) {
+    // If the parameter key is |embedded_search_key| and the value is not 0 this
+    // is an Instant Extended API Google search URL.
+    if (url.substr(key.begin, key.len) == embedded_search_key) {
+      return value.is_nonempty() && url.substr(value.begin, value.len) != "0";
+    }
+  }
+  return false;
+}
+
 bool IsOrganic(const std::string& brand) {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kOrganicInstall))
     return true;
 
 #if defined(OS_MACOSX)
   if (brand.empty()) {
     // An empty brand string on Mac is used for channels other than stable,
     // which are always organic.
     return true;
@@ skipping 42 matching lines @@
   const char* const kBrands[] = {
     "CHIQ", "CHSG", "HLJY", "NTMO", "OOBA", "OOBB", "OOBC", "OOBD", "OOBE",
     "OOBF", "OOBG", "OOBH", "OOBI", "OOBJ", "IDCM",
   };
   const char* const* end = &kBrands[arraysize(kBrands)];
   const char* const* found = std::find(&kBrands[0], end, brand);
   return found != end;
 }
 
 }  // namespace google_util