Add contextual search to the template url system

chrome/browser/search_engines/template_url.cc

Index: chrome/browser/search_engines/template_url.cc
diff --git a/chrome/browser/search_engines/template_url.cc b/chrome/browser/search_engines/template_url.cc
index 96c68ebed9c6d9561e0e23fb7684f2108ae902a6..853be23b551b3bd3b5b332a9f2cbc83b013297ee 100644
--- a/chrome/browser/search_engines/template_url.cc
+++ b/chrome/browser/search_engines/template_url.cc
@@ -103,6 +103,16 @@ const char kGoogleImageURLParameter[] = "google:imageURL";
 const char kGoogleImageOriginalWidth[] = "google:imageOriginalWidth";
 const char kGoogleImageOriginalHeight[] = "google:imageOriginalHeight";
 
+// Contextual search parameters.
+const char kGoogleContextualSearchVersion[] = "google:contextualSearchVersion";
+const char kGoogleContextualSearchStart[] = "google:contextualSearchStart";
+const char kGoogleContextualSearchEnd[] = "google:contextualSearchEnd";
+const char kGoogleContextualSearchContent[] = "google:contextualSearchContent";
+const char kGoogleContextualSearchBasePageURL[] =
+    "google:contextualSearchBasePageURL";
+const char kGoogleContextualSearchEncoding[] =
+    "google:contextualSearchEncoding";
+
 // Display value for kSearchTermsParameter.
 const char kDisplaySearchTerms[] = "%s";
 
@@ -209,7 +219,8 @@ TemplateURLRef::SearchTermsArgs::SearchTermsArgs(
       bookmark_bar_pinned(false),
       append_extra_query_params(false),
       force_instant_results(false),
-      from_app_list(false) {
+      from_app_list(false),
+      contextual_search_params(ContextualSearchParams()){
 }
 
 TemplateURLRef::SearchTermsArgs::~SearchTermsArgs() {
@@ -251,24 +262,26 @@ TemplateURLRef::~TemplateURLRef() {
 
 std::string TemplateURLRef::GetURL() const {
   switch (type_) {
-    case SEARCH:  return owner_->url();
-    case SUGGEST: return owner_->suggestions_url();
-    case INSTANT: return owner_->instant_url();
-    case IMAGE:   return owner_->image_url();
-    case NEW_TAB: return owner_->new_tab_url();
-    case INDEXED: return owner_->GetURL(index_in_owner_);
-    default:      NOTREACHED(); return std::string();  // NOLINT
+    case SEARCH:            return owner_->url();
+    case SUGGEST:           return owner_->suggestions_url();
+    case INSTANT:           return owner_->instant_url();
+    case IMAGE:             return owner_->image_url();
+    case NEW_TAB:           return owner_->new_tab_url();
+    case CONTEXTUAL_SEARCH: return owner_->contextual_search_url();
+    case INDEXED:           return owner_->GetURL(index_in_owner_);
+    default:       NOTREACHED(); return std::string();  // NOLINT
   }
 }
 
 std::string TemplateURLRef::GetPostParamsString() const {
   switch (type_) {
     case INDEXED:
-    case SEARCH:  return owner_->search_url_post_params();
-    case SUGGEST: return owner_->suggestions_url_post_params();
-    case INSTANT: return owner_->instant_url_post_params();
-    case NEW_TAB: return std::string();
-    case IMAGE:   return owner_->image_url_post_params();
+    case SEARCH:            return owner_->search_url_post_params();
+    case SUGGEST:           return owner_->suggestions_url_post_params();
+    case INSTANT:           return owner_->instant_url_post_params();
+    case NEW_TAB:           return std::string();
+    case CONTEXTUAL_SEARCH: return std::string();
+    case IMAGE:             return owner_->image_url_post_params();
     default:      NOTREACHED(); return std::string();  // NOLINT
   }
 }
@@ -592,6 +605,24 @@ bool TemplateURLRef::ParseParameter(size_t start,
     replacements->push_back(Replacement(GOOGLE_NTP_IS_THEMED, start));
   } else if (parameter == kGoogleOmniboxStartMarginParameter) {
     replacements->push_back(Replacement(GOOGLE_OMNIBOX_START_MARGIN, start));
+  } else if (parameter == kGoogleContextualSearchVersion) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_VERSION, start));
+  } else if (parameter == kGoogleContextualSearchStart) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_START, start));
+  } else if (parameter == kGoogleContextualSearchEnd) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_END, start));
+  } else if (parameter == kGoogleContextualSearchContent) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_CONTENT, start));
+  } else if (parameter == kGoogleContextualSearchBasePageURL) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_BASE_PAGE_URL, start));
+  } else if (parameter == kGoogleContextualSearchEncoding) {
+    replacements->push_back(
+        Replacement(GOOGLE_CONTEXTUAL_SEARCH_ENCODING, start));
   } else if (parameter == kGoogleOriginalQueryForSuggestionParameter) {
     replacements->push_back(Replacement(GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION,
                                         start));
@@ -928,6 +959,58 @@ std::string TemplateURLRef::HandleReplacements(
         }
         break;
 
+      case GOOGLE_CONTEXTUAL_SEARCH_VERSION:
+        if (search_terms_args.contextual_search_params.version >= 0) {
+          HandleReplacement(
+              "ctxs",
+              base::IntToString(
+                  search_terms_args.contextual_search_params.version),
+              *i,
+              &url);
+        }
+        break;
+
+      case GOOGLE_CONTEXTUAL_SEARCH_START:
+        HandleReplacement(
+            std::string(),
+            base::IntToString(search_terms_args.contextual_search_params.start),
+            *i,
+            &url);
+        break;
+
+      case GOOGLE_CONTEXTUAL_SEARCH_END:
+        HandleReplacement(
+            std::string(),
+            base::IntToString(search_terms_args.contextual_search_params.end),
+            *i,
+            &url);
+        break;
+
+      case GOOGLE_CONTEXTUAL_SEARCH_CONTENT: {
+        HandleReplacement(
+            std::string(),
+            search_terms_args.contextual_search_params.content,
+            *i,
+            &url);
+        break;
+      }
+
+      case GOOGLE_CONTEXTUAL_SEARCH_BASE_PAGE_URL: {
+        const std::string base_page_url =
+            search_terms_args.contextual_search_params.base_page_url;
+        if (!base_page_url.empty())
+          HandleReplacement("ctxs_url", base_page_url, *i, &url);
+        break;
+      }
+
+      case GOOGLE_CONTEXTUAL_SEARCH_ENCODING: {
+        const std::string encoding =
+            search_terms_args.contextual_search_params.encoding;
+        if (!encoding.empty())
+          HandleReplacement("ctxs_encoding", encoding, *i, &url);
+        break;
+      }
+
       case GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION:
         DCHECK(!i->is_post_param);
         if (search_terms_args.accepted_suggestion >= 0 ||
@@ -1099,7 +1182,8 @@ TemplateURL::TemplateURL(Profile* profile, const TemplateURLData& data)
       instant_url_ref_(this,
                        TemplateURLRef::INSTANT),
       image_url_ref_(this, TemplateURLRef::IMAGE),
-      new_tab_url_ref_(this, TemplateURLRef::NEW_TAB) {
+      new_tab_url_ref_(this, TemplateURLRef::NEW_TAB),
+      contextual_search_url_ref_(this, TemplateURLRef::CONTEXTUAL_SEARCH) {
   SetPrepopulateId(data_.prepopulate_id);
 
   if (data_.search_terms_replacement_key ==