Moves some functions in search.h to components.

chrome/browser/search/search.cc

 // Copyright 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/search/search.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
@@ skipping 10 matching lines @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/browser/ui/browser_iterator.h"
 #include "chrome/browser/ui/search/instant_search_prerenderer.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/search_urls.h"
 #include "chrome/common/url_constants.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/pref_registry/pref_registry_syncable.h"
+#include "components/search/search.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/sessions/serialized_navigation_entry.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(ENABLE_MANAGED_USERS)
 #include "chrome/browser/supervised_user/supervised_user_service.h"
 #include "chrome/browser/supervised_user/supervised_user_service_factory.h"
 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
 #endif
 
 namespace chrome {
 
 namespace {
 
-// Configuration options for Embedded Search.
-// EmbeddedSearch field trials are named in such a way that we can parse out
-// the experiment configuration from the trial's group name in order to give
-// us maximum flexability in running experiments.
-// Field trial groups should be named things like "Group7 espv:2 instant:1".
-// The first token is always GroupN for some integer N, followed by a
-// space-delimited list of key:value pairs which correspond to these flags:
-const char kEmbeddedPageVersionFlagName[] = "espv";
-#if defined(OS_IOS)
-const uint64 kEmbeddedPageVersionDefault = 1;
-#elif defined(OS_ANDROID)
-const uint64 kEmbeddedPageVersionDefault = 1;
-// Use this variant to enable EmbeddedSearch SearchBox API in the results page.
-const uint64 kEmbeddedSearchEnabledVersion = 2;
-#else
-const uint64 kEmbeddedPageVersionDefault = 2;
-#endif
-
 const char kHideVerbatimFlagName[] = "hide_verbatim";
 const char kPrefetchSearchResultsFlagName[] = "prefetch_results";
 const char kPrefetchSearchResultsOnSRP[] = "prefetch_results_srp";
 const char kAllowPrefetchNonDefaultMatch[] = "allow_prefetch_non_default_match";
 const char kPrerenderInstantUrlOnOmniboxFocus[] =
     "prerender_instant_url_on_omnibox_focus";
 
 // Controls whether to reuse prerendered Instant Search base page to commit any
 // search query.
 const char kReuseInstantSearchBasePage[] = "reuse_instant_search_base_page";
 
 // Controls whether to use the alternate Instant search base URL. This allows
 // experimentation of Instant search.
 const char kUseAltInstantURL[] = "use_alternate_instant_url";
 const char kAltInstantURLPath[] = "search";
 const char kAltInstantURLQueryParams[] = "&qbp=1";
 
 const char kDisplaySearchButtonFlagName[] = "display_search_button";
 const char kOriginChipFlagName[] = "origin_chip";
 #if !defined(OS_IOS) && !defined(OS_ANDROID)
 const char kEnableQueryExtractionFlagName[] = "query_extraction";
 #endif
 const char kShouldShowGoogleLocalNTPFlagName[] = "google_local_ntp";
 
-// Constants for the field trial name and group prefix.
-// Note in M30 and below this field trial was named "InstantExtended" and in
-// M31 was renamed to EmbeddedSearch for clarity and cleanliness.  Since we
-// can't easilly sync up Finch configs with the pushing of this change to
-// Dev & Canary, for now the code accepts both names.
-// TODO(dcblack): Remove the InstantExtended name once M31 hits the Beta
-// channel.
-const char kInstantExtendedFieldTrialName[] = "InstantExtended";
-const char kEmbeddedSearchFieldTrialName[] = "EmbeddedSearch";
-
-// If the field trial's group name ends with this string its configuration will
-// be ignored and Instant Extended will not be enabled by default.
-const char kDisablingSuffix[] = "DISABLED";
-
 // Status of the New Tab URL for the default Search provider. NOTE: Used in a
 // UMA histogram so values should only be added at the end and not reordered.
 enum NewTabURLState {
   // Valid URL that should be used.
   NEW_TAB_URL_VALID = 0,
 
   // Corrupt state (e.g. no profile or template url).
   NEW_TAB_URL_BAD = 1,
 
   // URL should not be used because in incognito window.
@@ skipping 223 matching lines @@
 
   GURL url;
   NewTabURLState state;
 };
 
 }  // namespace
 
 // Negative start-margin values prevent the "es_sm" parameter from being used.
 const int kDisableStartMargin = -1;
 
-bool IsInstantExtendedAPIEnabled() {
-#if defined(OS_IOS)
-  return false;
-#elif defined(OS_ANDROID)
-  return EmbeddedSearchPageVersion() == kEmbeddedSearchEnabledVersion;
-#else
-  return true;
-#endif  // defined(OS_IOS)
-}
-
-// Determine what embedded search page version to request from the user's
-// default search provider. If 0, the embedded search UI should not be enabled.
-uint64 EmbeddedSearchPageVersion() {
-#if defined(OS_ANDROID)
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableEmbeddedSearchAPI)) {
-    return kEmbeddedSearchEnabledVersion;
-  }
-#endif
-
-  FieldTrialFlags flags;
-  if (GetFieldTrialInfo(&flags)) {
-    return GetUInt64ValueForFlagWithDefault(kEmbeddedPageVersionFlagName,
-                                            kEmbeddedPageVersionDefault,
-                                            flags);
-  }
-  return kEmbeddedPageVersionDefault;
-}
-
 std::string InstantExtendedEnabledParam(bool for_search) {
   if (for_search && !chrome::IsQueryExtractionEnabled())
     return std::string();
   return std::string(google_util::kInstantExtendedAPIParam) + "=" +
       base::Uint64ToString(EmbeddedSearchPageVersion()) + "&";
 }
 
 std::string ForceInstantResultsParam(bool for_prerender) {
   return (for_prerender || !IsInstantExtendedAPIEnabled()) ?
       "ion=1&" : std::string();
@@ skipping 402 matching lines @@
   FieldTrialFlags flags;
   return GetFieldTrialInfo(&flags) && GetBoolValueForFlagWithDefault(
       kPrefetchSearchResultsOnSRP, false, flags);
 }
 
 void EnableQueryExtractionForTesting() {
   CommandLine* cl = CommandLine::ForCurrentProcess();
   cl->AppendSwitch(switches::kEnableQueryExtraction);
 }
 
-bool GetFieldTrialInfo(FieldTrialFlags* flags) {
-  // Get the group name.  If the EmbeddedSearch trial doesn't exist, look for
-  // the older InstantExtended name.
-  std::string group_name = base::FieldTrialList::FindFullName(
-      kEmbeddedSearchFieldTrialName);
-  if (group_name.empty()) {
-    group_name = base::FieldTrialList::FindFullName(
-        kInstantExtendedFieldTrialName);
-  }
-
-  if (EndsWith(group_name, kDisablingSuffix, true))
-    return false;
-
-  // We have a valid trial that isn't disabled. Extract the flags.
-  std::string group_prefix(group_name);
-  size_t first_space = group_name.find(" ");
-  if (first_space != std::string::npos) {
-    // There is a flags section of the group name. Split that out and parse it.
-    group_prefix = group_name.substr(0, first_space);
-    if (!base::SplitStringIntoKeyValuePairs(group_name.substr(first_space),
-                                            ':', ' ', flags)) {
-      // Failed to parse the flags section. Assume the whole group name is
-      // invalid.
-      return false;
-    }
-  }
-  return true;
-}
-
-// Given a FieldTrialFlags object, returns the string value of the provided
-// flag.
-std::string GetStringValueForFlagWithDefault(const std::string& flag,
-                                             const std::string& default_value,
-                                             const FieldTrialFlags& flags) {
-  FieldTrialFlags::const_iterator i;
-  for (i = flags.begin(); i != flags.end(); i++) {
-    if (i->first == flag)
-      return i->second;
-  }
-  return default_value;
-}
-
-// Given a FieldTrialFlags object, returns the uint64 value of the provided
-// flag.
-uint64 GetUInt64ValueForFlagWithDefault(const std::string& flag,
-                                        uint64 default_value,
-                                        const FieldTrialFlags& flags) {
-  uint64 value;
-  std::string str_value =
-      GetStringValueForFlagWithDefault(flag, std::string(), flags);
-  if (base::StringToUint64(str_value, &value))
-    return value;
-  return default_value;
-}
-
-// Given a FieldTrialFlags object, returns the boolean value of the provided
-// flag.
-bool GetBoolValueForFlagWithDefault(const std::string& flag,
-                                    bool default_value,
-                                    const FieldTrialFlags& flags) {
-  return !!GetUInt64ValueForFlagWithDefault(flag, default_value ? 1 : 0, flags);
-}
-
 bool ShouldUseAltInstantURL() {
   FieldTrialFlags flags;
   return GetFieldTrialInfo(&flags) && GetBoolValueForFlagWithDefault(
       kUseAltInstantURL, false, flags);
 }
 
 }  // namespace chrome