Updating the method called when System UI visibility/size changes

remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java

Index: remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java b/remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java
index f47a651e2723faf7b74c97e9b93b379bb2b19b48..35f9ee6709c1beefaa4272a8919d23fdb0364f99 100644
--- a/remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java
+++ b/remoting/android/java/src/org/chromium/chromoting/DesktopCanvas.java
@@ -30,7 +30,7 @@ public class DesktopCanvas {
     private PointF mViewportPosition = new PointF();
 
     /**
-     * Represents the amount of space, in pixels, used by system UI.
+     * Represents the amount of space, in pixels, used by System UI.
      */
     private Rect mSystemUiOffsetPixels = new Rect();
 
@@ -104,17 +104,22 @@ public class DesktopCanvas {
     }
 
     /**
-     * Sets the offset values used to calculate the space used by system UI.
+     * Sets the offset values used to calculate the space used by System UI.
      *
-     * @param left The space used by system UI on the left edge of the screen.
-     * @param top The space used by system UI on the top edge of the screen.
-     * @param right The space used by system UI on the right edge of the screen.
-     * @param bottom The space used by system UI on the bottom edge of the screen.
+     * @param left The space used by System UI on the left edge of the screen.
+     * @param top The space used by System UI on the top edge of the screen.
+     * @param right The space used by System UI on the right edge of the screen.
+     * @param bottom The space used by System UI on the bottom edge of the screen.
      */
     public void setSystemUiOffsetValues(int left, int top, int right, int bottom) {
         mSystemUiOffsetPixels.set(left, top, right, bottom);
     }
 
+    /** Called to indicate that no System UI is visible. */
+    public void clearSystemUiOffsets() {
+        mSystemUiOffsetPixels.setEmpty();
+    }
+
     /** Repositions the image by zooming it such that the image is displayed without borders. */
     public void resizeImageToFitScreen() {
         // Protect against being called before the image has been initialized.