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 05d1720d1178c7f09dac3743d23165fcef1242b8..35ab2efba6d892c7508a7f054e6600ee9c8ed724 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -156,6 +156,8 @@
       'browser/android/hung_renderer_infobar_delegate.h',
       'browser/android/intent_helper.cc',
       'browser/android/intent_helper.h',
+      'browser/android/interests_service.cc',
+      'browser/android/interests_service.h',
       'browser/android/intercept_download_resource_throttle.cc',
       'browser/android/intercept_download_resource_throttle.h',
       'browser/android/java_exception_reporter.cc',
@@ -536,6 +538,8 @@
       '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/interests_fetcher.cc',
+      'browser/interests/interests_fetcher.h',
       'browser/internal_auth.cc',
       'browser/internal_auth.h',
       'browser/interstitials/chrome_metrics_helper.cc',
@@ -1766,6 +1770,7 @@
       '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',