[Android] Port Scroller.java to C++ and use for fling animations

content/app/android/library_loader_hooks.cc

Index: content/app/android/library_loader_hooks.cc
diff --git a/content/app/android/library_loader_hooks.cc b/content/app/android/library_loader_hooks.cc
index 868017cf28ae1e8acc3070bfdccbf7d681dc22f5..c6cb97cbd5ce73c4136b5233c38afe44fd2f2cf2 100644
--- a/content/app/android/library_loader_hooks.cc
+++ b/content/app/android/library_loader_hooks.cc
@@ -18,7 +18,6 @@
 #include "base/tracked_objects.h"
 #include "content/app/android/app_jni_registrar.h"
 #include "content/browser/android/browser_jni_registrar.h"
-#include "content/child/android/child_jni_registrar.h"
 #include "content/common/android/common_jni_registrar.h"
 #include "content/common/content_constants_internal.h"
 #include "content/public/common/content_switches.h"
@@ -54,9 +53,6 @@ bool EnsureJniRegistered(JNIEnv* env) {
     if (!ui::shell_dialogs::RegisterJni(env))
       return false;
 
-    if (!content::android::RegisterChildJni(env))
-      return false;
-
     if (!content::android::RegisterCommonJni(env))
       return false;