Support variable changing in SDK interface and v8 native

plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java

Index: plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java
diff --git a/plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java b/plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java
index 069714112006541dd995b0d3b71ee55b2d350ece..d9640ccd7af30ea389a7a42c051fd81c827638e4 100755
--- a/plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java
+++ b/plugins/org.chromium.sdk/src/org/chromium/sdk/internal/v8native/protocol/V8ProtocolUtil.java
@@ -8,6 +8,7 @@ import java.util.AbstractList;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.chromium.sdk.JsValue;
 import org.chromium.sdk.Script;
 import org.chromium.sdk.Script.Type;
 import org.chromium.sdk.Version;
@@ -329,6 +330,14 @@ public class V8ProtocolUtil {
     return Version.parseString(versionString);
   }
 
+  // This method extracts string message from exception value. The accurate way is to get
+  // message property, but since we currently don't have true exception values (we have only
+  // surrogate strings), the current approach is ok. Later this method may become
+  // asynchronous.
+  public static String getExceptionString(JsValue exception) {
+    return exception.getValueString();
+  }
+
   private static String getNameOrInferred(JSONObject obj, V8Protocol nameProperty) {
     String name = JsonUtil.getAsString(obj, nameProperty);
     if (isNullOrEmpty(name)) {