Return void in zoomBy plumbing to match zoomBy public API

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java

Index: android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java
diff --git a/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java b/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java
index caafebc82e1be3a18f08424adcb1e8ab06c1bd12..79424ec12ab1fba5441e6f62eb569781043c7d72 100644
--- a/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java
+++ b/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java
@@ -1448,12 +1448,15 @@ class WebViewChromium implements WebViewProvider, WebViewProvider.ScrollDelegate
         return mAwContents.zoomOut();
     }
 
+    // TODO(paulmiller) Return void for consistency with AwContents.zoomBy and WebView.zoomBy -
+    // tricky because frameworks WebViewProvider.zoomBy must change simultaneously
     @Override
     public boolean zoomBy(float factor) {
         mFactory.startYourEngines(true);
         // This is an L API and therefore we can enforce stricter threading constraints.
         checkThread();
-        return mAwContents.zoomBy(factor);
+        mAwContents.zoomBy(factor);
+        return true;
     }
 
     @Override