Resize only the virtual viewport when the OSK triggers a resize.

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 360df911cbc53281130f199a6a8bf030b5f058cb..23181f93b32bd5f35094c9e8cbe2edf7dabdb82b 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
@@ -1029,6 +1029,14 @@ public class ContentViewCore implements AccessibilityStateChangeListener, Screen
     }
 
     /**
+     * @return Viewport height when the OSK is hidden in physical pixels as set from onSizeChanged.
+     */
+    @CalledByNative
+    public int getViewportHeightWithOSKHiddenPix() {
+        return mViewportHeightPix + getContentViewClient().getSystemWindowInsetBottom();
+    }
+
+    /**
      * @return Width of underlying physical surface.
      */
     @CalledByNative
@@ -1058,6 +1066,22 @@ public class ContentViewCore implements AccessibilityStateChangeListener, Screen
     }
 
     /**
+     * @return Current device scale factor (maps DIP pixels to physical pixels).
+     */
+    @VisibleForTesting
+    public float getDeviceScaleFactor() {
+        return mRenderCoordinates.getDeviceScaleFactor();
+    }
+
+    /**
+     * @return Current page scale factor (maps CSS pixels to DIP pixels).
+     */
+    @VisibleForTesting
+    public float getPageScaleFactor() {
+        return mRenderCoordinates.getPageScaleFactor();
+    }
+
+    /**
      * @see android.webkit.WebView#getContentHeight()
      */
     public float getContentHeightCss() {