Adds selection expansion support for Contextual Search.

chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc

Index: chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc
diff --git a/chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc b/chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc
index 26c8f1d748e3d1293133165c03fff20e9280daca..2cae71599729039f3084f3a1ad41f252bfe77679 100644
--- a/chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc
+++ b/chrome/browser/android/contextualsearch/contextual_search_delegate_unittest.cc
@@ -7,12 +7,15 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
 #include "chrome/browser/android/contextualsearch/contextual_search_context.h"
 #include "components/search_engines/template_url_service.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using base::ListValue;
+
 namespace {
 
 const char kSomeSpecificBasePage[] = "http://some.specific.host.name.com";
@@ -282,6 +285,17 @@ TEST_F(ContextualSearchDelegateTest, SurroundingTextNoBeforeText) {
   EXPECT_EQ("ee f", after_text());
 }
 
+TEST_F(ContextualSearchDelegateTest, ExtractMentionsStartEnd) {

[palmer, 2015/07/09 21:15:17]

It'd be a good idea to add some negative tests with crazy start and end values.

[aurimas (slooooooooow), 2015/07/10 01:46:49]

Added a bunch of tests.

+  ListValue mentions_list;
+  mentions_list.AppendInteger(1);
+  mentions_list.AppendInteger(2);
+  size_t start = 0;
+  size_t end = 0;
+  delegate_->ExtractMentionsStartEnd(mentions_list, &start, &end);
+  EXPECT_EQ(static_cast<size_t>(1), start);
+  EXPECT_EQ(static_cast<size_t>(2), end);
+}
+
 TEST_F(ContextualSearchDelegateTest, SurroundingTextForIcing) {
   base::string16 sample = base::ASCIIToUTF16("this is Barack Obama in office.");
   int limit_each_side = 3;