NTP: add histogram to track New Tab page URL status.

chrome/browser/search/search_unittest.cc

Index: chrome/browser/search/search_unittest.cc
diff --git a/chrome/browser/search/search_unittest.cc b/chrome/browser/search/search_unittest.cc
index 6d76b0a8dce01d14a886f802485d0485e35ce806..083bb6cc85083294053c4f5a81a4ddbe925247dc 100644
--- a/chrome/browser/search/search_unittest.cc
+++ b/chrome/browser/search/search_unittest.cc
@@ -218,6 +218,11 @@ class SearchTest : public BrowserWithTestWindowTest {
         contents->GetRenderProcessHost()->GetID());
   }
 
+  content::BrowserContext* AsBrowserContext(Profile* profile) {
+    // Following implementation of FromBrowserContext:
+    return static_cast<Profile*>(profile);
+  }
+
   scoped_ptr<base::FieldTrialList> field_trial_list_;
 };
 
@@ -521,9 +526,13 @@ TEST_F(SearchTest, InstantCacheableNTPNavigationEntryNewProfile) {
                                    controller.GetLastCommittedEntry()));
 }
 
-TEST_F(SearchTest, UseLocalNTPInIncognito) {
-  EXPECT_EQ(GURL(), chrome::GetNewTabPageURL(
-      profile()->GetOffTheRecordProfile()));
+TEST_F(SearchTest, NoRewriteInIncognito) {
+  profile()->ForceIncognito(true);
+  EXPECT_EQ(GURL(), chrome::GetNewTabPageURL(profile()));
+  GURL new_tab_url(chrome::kChromeUINewTabURL);
+  EXPECT_FALSE(HandleNewTabURLRewrite(&new_tab_url, AsBrowserContext(
+      profile())));
+  EXPECT_EQ(GURL(chrome::kChromeUINewTabURL), new_tab_url);
 }
 
 TEST_F(SearchTest, UseLocalNTPIfNTPURLIsInsecure) {
@@ -531,6 +540,10 @@ TEST_F(SearchTest, UseLocalNTPIfNTPURLIsInsecure) {
   SetSearchProvider(true, true);
   EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl),
             chrome::GetNewTabPageURL(profile()));
+  GURL new_tab_url(chrome::kChromeUINewTabURL);
+  EXPECT_TRUE(
+      HandleNewTabURLRewrite(&new_tab_url, AsBrowserContext(profile())));
+  EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl), new_tab_url);
 }
 
 TEST_F(SearchTest, UseLocalNTPIfNTPURLIsNotSet) {
@@ -538,6 +551,10 @@ TEST_F(SearchTest, UseLocalNTPIfNTPURLIsNotSet) {
   SetSearchProvider(false, true);
   EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl),
             chrome::GetNewTabPageURL(profile()));
+  GURL new_tab_url(chrome::kChromeUINewTabURL);
+  EXPECT_TRUE(
+      HandleNewTabURLRewrite(&new_tab_url, AsBrowserContext(profile())));
+  EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl), new_tab_url);
 }
 
 TEST_F(SearchTest, UseLocalNTPIfNTPURLIsBlockedForSupervisedUser) {
@@ -552,6 +569,10 @@ TEST_F(SearchTest, UseLocalNTPIfNTPURLIsBlockedForSupervisedUser) {
 
   EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl),
             chrome::GetNewTabPageURL(profile()));
+  GURL new_tab_url(chrome::kChromeUINewTabURL);
+  EXPECT_TRUE(
+      HandleNewTabURLRewrite(&new_tab_url, AsBrowserContext(profile())));
+  EXPECT_EQ(GURL(chrome::kChromeSearchLocalNtpUrl), new_tab_url);
   EXPECT_EQ(GURL(), GetInstantURL(profile(), kDisableStartMargin, false));
 }