[Android WebView] Propagate Java exceptions for evaluateJavascript

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index ac2cb98c0c82a15ed565ba82aa13a72128d7f4ad..76452036e410a75cba73d8c7c79dfb9f7331fad7 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -2269,8 +2269,17 @@ public class AwContents implements SmartClipProvider {
         if (callback != null) {
             jsCallback = new JavaScriptCallback() {
                 @Override
-                public void handleJavaScriptResult(String jsonResult) {
-                    callback.onReceiveValue(jsonResult);
+                public void handleJavaScriptResult(final String jsonResult) {
+                    // Post the application callback back to the current thread to ensure the
+                    // application callback is executed without any native code on the stack. This
+                    // so that any exception thrown by the application callback won't have to be
+                    // propagated through a native call stack.
+                    mHandler.post(new Runnable() {
+                        @Override
+                        public void run() {
+                            callback.onReceiveValue(jsonResult);
+                        }
+                    });
                 }
             };
         }