Add chrome://popular-sites-internals/ to iOS.

ios/chrome/browser/chrome_url_constants.cc

Index: ios/chrome/browser/chrome_url_constants.cc
diff --git a/ios/chrome/browser/chrome_url_constants.cc b/ios/chrome/browser/chrome_url_constants.cc
index 1dc20791c2ae45fa15c284e5c1eaec86e46cbe76..4017a7c092d602974f11c07982fc8d2a573dcb71 100644
--- a/ios/chrome/browser/chrome_url_constants.cc
+++ b/ios/chrome/browser/chrome_url_constants.cc
@@ -18,6 +18,8 @@ const char kChromeUIFlagsURL[] = "chrome://flags/";
 const char kChromeUIHistoryURL[] = "chrome://history/";
 const char kChromeUINewTabURL[] = "chrome://newtab/";
 const char kChromeUIPhysicalWebURL[] = "chrome://physical-web/";
+const char kChromeUIPopularSitesInternalsURL[] =
+    "chrome://popular-sites-internals/";
 const char kChromeUISettingsURL[] = "chrome://settings/";
 const char kChromeUITermsURL[] = "chrome://terms/";
 const char kChromeUIVersionURL[] = "chrome://version/";
@@ -38,6 +40,7 @@ const char kChromeUINetExportHost[] = "net-export";
 const char kChromeUINewTabHost[] = "newtab";
 const char kChromeUIOmahaHost[] = "omaha";
 const char kChromeUIPhysicalWebHost[] = "physical-web";
+const char kChromeUIPopularSitesInternalsHost[] = "popular-sites-internals";
 const char kChromeUIPolicyHost[] = "policy";
 const char kChromeUISignInInternalsHost[] = "signin-internals";
 const char kChromeUISyncInternalsHost[] = "sync-internals";
@@ -52,8 +55,8 @@ const char* const kChromeHostURLs[] = {
     kChromeUICreditsHost,     kChromeUIFlagsHost,
     kChromeUIHistogramHost,   kChromeUINetExportHost,
     kChromeUINewTabHost,      kChromeUISyncInternalsHost,
-    kChromeUIPhysicalWebHost, kChromeUITermsHost,
-    kChromeUIVersionHost,
+    kChromeUIPhysicalWebHost, kChromeUIPopularSitesInternalsHost,

[Bernhard Bauer, 2016/10/28 13:23:07]

Wait, this list actually is in two columns?
http://www.reactiongifs.com/r/but-why.gif

[sdefresne, 2016/10/28 13:34:03]

This is how clang-format format the list and //ios requires code to be formatted
with clang-format.

+    kChromeUITermsHost,       kChromeUIVersionHost,
 };
 const size_t kNumberOfChromeHostURLs = arraysize(kChromeHostURLs);