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

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 17449f38e2c9955aa0cfb0b2783f1aabd6b1837b..410b488b17bfba554380abd1be7c6c8267b96849 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -1657,11 +1657,11 @@ public class ContentViewCore implements MotionEventDelegate {
                 public void showHandlesAt(int x1, int y1, int dir1, int x2, int y2, int dir2) {
                     super.showHandlesAt(x1, y1, dir1, x2, y2, dir2);
                     mStartHandleNormalizedPoint.set(
-                        (x1 + mNativeScrollX) / mNativePageScaleFactor,
-                        (y1 + mNativeScrollY) / mNativePageScaleFactor);
+                            (x1 + mNativeScrollX) / mNativePageScaleFactor,
+                            (y1 + mNativeScrollY) / mNativePageScaleFactor);
                     mEndHandleNormalizedPoint.set(
-                        (x2 + mNativeScrollX) / mNativePageScaleFactor,
-                        (y2 + mNativeScrollY) / mNativePageScaleFactor);
+                            (x2 + mNativeScrollX) / mNativePageScaleFactor,
+                            (y2 + mNativeScrollY) / mNativePageScaleFactor);
 
                     showSelectActionBar();
                 }
@@ -1701,8 +1701,8 @@ public class ContentViewCore implements MotionEventDelegate {
                 public void showHandleAt(int x, int y) {
                     super.showHandleAt(x, y);
                     mInsertionHandleNormalizedPoint.set(
-                        (x + mNativeScrollX) / mNativePageScaleFactor,
-                        (y + mNativeScrollY) / mNativePageScaleFactor);
+                            (x + mNativeScrollX) / mNativePageScaleFactor,
+                            (y + mNativeScrollY) / mNativePageScaleFactor);
                 }
             };
 
@@ -1868,6 +1868,13 @@ public class ContentViewCore implements MotionEventDelegate {
 
     @SuppressWarnings("unused")
     @CalledByNative
+    private void updateOffsetsForFullscreen(float controlsOffsetY, float contentOffsetY) {
+        if (mContentViewClient == null) return;
+        mContentViewClient.onOffsetsForFullscreenChanged(controlsOffsetY, contentOffsetY);
+    }
+
+    @SuppressWarnings("unused")
+    @CalledByNative
     private void updatePageScaleLimits(float minimumScale, float maximumScale) {
         mNativeMinimumScale = minimumScale;
         mNativeMaximumScale = maximumScale;