ChromeLauncherActivity did not have sanitation of incoming intents, and thus
if for example an intent with a bad Parcel was sent, Chrome crashed.
This change strips away all extras and makes sure Chrome properly opens the
intended website instead.

Version: Tip of master (And any version before that)
OS: Android

What steps will reproduce the problem?
(1) In an old version of the Facebook app, click on a link

OR
(1) Create an app that fires an intent with a Parcelable that does
    not exist in Chrome's classpath

What is the expected output?
Chrome opens the intent's website as expected

What do you see instead?
Chrome crashes during startup.

Please use labels and text to provide additional information.
Exception according to logcat: (Line numbers might vary)
Caused by: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: com.facebook.events.common.ActionSource
at android.os.Parcel.readParcelableCreator(Parcel.java:2163)
at android.os.Parcel.readParcelable(Parcel.java:2113)
at android.os.Parcel.readValue(Parcel.java:2029)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2330)
at android.os.Bundle.unparcel(Bundle.java:249)
at android.os.Bundle.putLong(Bundle.java:482)
at android.content.Intent.putExtra(Intent.java:5756)
at org.chromium.chrome.browser.IntentHandler.addTimestampToIntent(IntentHandler.java:604)
at org.chromium.chrome.browser.document.ChromeLauncherActivity.onCreate(ChromeLauncherActivity.java:132)
at android.app.Activity.performCreate(Activity.java:5277)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2213)