Adjust viewport center when in trackpad input mode.

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chromoting;
 
 import android.content.Context;
 import android.graphics.Matrix;
 import android.graphics.PointF;
 import android.graphics.Rect;
@@ skipping 309 matching lines @@
                 parameter.hostCapability;
         // We need both input mode and host input capabilities to select the input
         // strategy.
         if (!inputMode.isSet() || !hostTouchCapability.isSet()) {
             return;
         }
 
         switch (inputMode) {
             case TRACKPAD:
                 setInputStrategy(new TrackpadInputStrategy(mRenderData, injector));
+                mDesktopCanvas.adjustViewportForSystemUi(true);
                 moveCursorToScreenCenter();
                 break;
 
             case TOUCH:
+                mDesktopCanvas.adjustViewportForSystemUi(false);
                 if (hostTouchCapability.isSupported()) {
                     setInputStrategy(new TouchInputStrategy(mRenderData, injector));
                 } else {
                     setInputStrategy(
                             new SimulatedTouchInputStrategy(mRenderData, injector, mContext));
                 }
                 break;
 
             default:
                 // Unreachable, but required by Google Java style and findbugs.
@@ skipping 347 matching lines @@
             float[] mappedPoints = mapScreenPointToImagePoint(screenX, screenY);
 
             float imageWidth = (float) mRenderData.imageWidth + EPSILON;
             float imageHeight = (float) mRenderData.imageHeight + EPSILON;
 
             return mappedPoints[0] < -EPSILON || mappedPoints[0] > imageWidth
                     || mappedPoints[1] < -EPSILON || mappedPoints[1] > imageHeight;
         }
     }
 }