Cannot find symbols

[ghost]

I've tried your instructions of updating the chromium sources. However, I cannot build using ./gradlew assemble, I get a lot of "Cannot find symbols" message, like this:

symbol: variable SendTabToSelfAndroidBridgeJni
location: class SendTabToSelfAndroidBridge
/home/blomium/src/chrome/android/java/src/org/chromium/chrome/browser/send_tab_to_self/SendTabToSelfAndroidBridge.java:71: error: cannot find symbol
return SendTabToSelfAndroidBridgeJni.get().addEntry(

Any clues of how I can solve them ?