Update DesktopCanvas to allow over-panning when Soft Input Method is present.

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

 // Copyright 2015 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.graphics.Matrix;
 import android.graphics.PointF;
 import android.graphics.Rect;
 import android.graphics.RectF;
@@ skipping 112 matching lines @@
         setCursorPosition(mCursorPosition.x + deltaX, mCursorPosition.y + deltaY);
         return new PointF(mCursorPosition.x, mCursorPosition.y);
     }
 
     /**
      * Handles System UI size and visibility changes.
      *
      * @param parameter The set of values defining the current System UI state.
      */
     public void onSystemUiVisibilityChanged(SystemUiVisibilityChangedEventParameter parameter) {
-        if (parameter.systemUiVisible) {
+        if (parameter.softInputMethodVisible) {

[Yuwei, 2016/10/11 18:57:37]

I think you also mentioned that you want to make over-panning always enabled in
multi-window mode. Is this something you want to do later?

[Yuwei, 2016/10/11 18:57:37]

IIUC change of soft keyboard's visibility will always trigger a
SystemUiVisibilityChanged event, right?

[joedow, 2016/10/11 19:00:44]

Definitely later, we cannot compile against the N SDK yet.

[joedow, 2016/10/11 19:00:44]

Yes it will.

             mSystemUiScreenSize.set(parameter.left, parameter.top,
                     mRenderData.screenWidth - parameter.right,
                     mRenderData.screenHeight - parameter.bottom);
 
             if (mAdjustViewportForSystemUi) {
                 // Adjust the cursor position to ensure it's visible when large System UI (1/3 or
                 // more of the total screen size) is displayed (typically the Soft Keyboard).
                 // Without this change, it is difficult for users to enter text into edit controls
                 // which are located bottom of the screen and may not see the cursor at all.
                 if (mSystemUiScreenSize.bottom > (mRenderData.screenHeight / 3)) {
@@ skipping 227 matching lines @@
         PointF letterboxPadding = getLetterboxPadding();
         float[] imagePoints = {0.0f, 0.0f, mRenderData.imageWidth, mRenderData.imageHeight};
         mRenderData.transform.mapPoints(imagePoints);
 
         mVisibleImagePadding.set(Math.max(imagePoints[0] - letterboxPadding.x, 0.0f),
                 Math.max(imagePoints[1] - letterboxPadding.y, 0.0f),
                 Math.max(mRenderData.screenWidth - imagePoints[2] - letterboxPadding.x, 0.0f),
                 Math.max(mRenderData.screenHeight - imagePoints[3] - letterboxPadding.y, 0.0f));
     }
 }