Some initial changes for manipulating the top controls positions on Android.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 676e3862d35749f71a8ba81e8c6cd74b8b055d62..42be6d0a115f5226c60dc50ebe3347b8f04ff3ea 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -416,6 +416,17 @@ void ContentViewCoreImpl::UpdatePageScaleLimits(float minimum_scale,
                                              maximum_scale);
 }
 
+void ContentViewCoreImpl::UpdateOffsetsForFullscreen(float controls_offset,
+                                                     float content_offset) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_ContentViewCore_updateOffsetsForFullscreen(env, obj.obj(),
+                                                  controls_offset,
+                                                  content_offset);
+}
+
 void ContentViewCoreImpl::SetTitle(const string16& title) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);