Add the JNI code in order to let Java use the InterestsFetcher.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 471be68dfa49d10d24611274db7e996d67456a3c..526b8abbc850fd077c4c708dcea1a43f25b0af2c 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -544,6 +544,8 @@
       'browser/install_verification/win/module_list.h',
       'browser/install_verification/win/module_verification_common.cc',
       'browser/install_verification/win/module_verification_common.h',
+      'browser/interests/android/interests_service.cc',
+      'browser/interests/android/interests_service.h',
       'browser/interests/interests_fetcher.cc',
       'browser/interests/interests_fetcher.h',
       'browser/internal_auth.cc',
@@ -1782,6 +1784,7 @@
       'android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java',
       'android/java/src/org/chromium/chrome/browser/ntp/ForeignSessionHelper.java',
       'android/java/src/org/chromium/chrome/browser/ntp/LogoBridge.java',
+      'android/java/src/org/chromium/chrome/browser/ntp/InterestsService.java',
       'android/java/src/org/chromium/chrome/browser/ntp/NewTabPagePrefs.java',
       'android/java/src/org/chromium/chrome/browser/ntp/RecentlyClosedBridge.java',
       'android/java/src/org/chromium/chrome/browser/infobar/DownloadOverwriteInfoBar.java',