[ios] Remove chrome://history from chrome://chrome-urls page

chrome://history is no longer live for iOS, so remove it from
the chrome://chrome-urls page.

BUG=643385

Review-Url: https://codereview.chromium.org/2303913002
Cr-Commit-Position: refs/heads/master@{#416098}

ios/chrome/browser/chrome_url_constants.cc

@@ -46,10 +46,10 @@ const char kChromeUIVersionHost[] = "version";
 // These hosts will also be suggested by BuiltinProvider.
 // 'histograms' is chrome WebUI on iOS, content WebUI on other platforms.
 const char* const kChromeHostURLs[] = {
-    kChromeUIBookmarksHost, kChromeUIChromeURLsHost, kChromeUICreditsHost,
-    kChromeUIFlagsHost,     kChromeUIHistogramHost,  kChromeUIHistoryHost,
-    kChromeUINetExportHost, kChromeUINewTabHost,     kChromeUISyncInternalsHost,
-    kChromeUITermsHost,     kChromeUIVersionHost,
+    kChromeUIBookmarksHost, kChromeUIChromeURLsHost,    kChromeUICreditsHost,
+    kChromeUIFlagsHost,     kChromeUIHistogramHost,     kChromeUINetExportHost,
+    kChromeUINewTabHost,    kChromeUISyncInternalsHost, kChromeUITermsHost,
+    kChromeUIVersionHost,
 };
 const size_t kNumberOfChromeHostURLs = arraysize(kChromeHostURLs);