Rethrow exception when swallowing it is not intended.

Source/bindings/v8/V8BindingMacros.h

Index: Source/bindings/v8/V8BindingMacros.h
diff --git a/Source/bindings/v8/V8BindingMacros.h b/Source/bindings/v8/V8BindingMacros.h
index 1dc394acfe3ba66c63af186c05df988d07bff798..1abb3233b80b58d42a3e03bee83d8533635d9449 100644
--- a/Source/bindings/v8/V8BindingMacros.h
+++ b/Source/bindings/v8/V8BindingMacros.h
@@ -71,28 +71,26 @@ namespace WebCore {
     }
 
 #define TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState) \
-    var = (value);                                                       \
-    if (UNLIKELY(block.HasCaught()))                                     \
-        exceptionState.rethrowV8Exception(block.Exception());            \
-    if (UNLIKELY(exceptionState.throwIfNeeded()))                        \
-        return;
+    var = (value);                                                        \
+    if (UNLIKELY(block.HasCaught() || exceptionState.throwIfNeeded()))    \
+        return;                                                           \
 
-#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState)    \
-    type var;                                                             \
-    {                                                                     \
-        v8::TryCatch block;                                               \
+#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState)     \
+    type var;                                                              \
+    {                                                                      \
+        v8::TryCatch block;                                                \
+        V8RethrowTryCatchScope rethrow(block);                             \
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState); \
     }
 
 #define TONATIVE_DEFAULT_EXCEPTIONSTATE(type, var, value, exceptionState, retVal) \
-    type var;                                                                 \
-    {                                                                         \
-        v8::TryCatch block;                                                   \
-        var = (value);                                                        \
-        if (UNLIKELY(block.HasCaught()))                                      \
-            exceptionState.rethrowV8Exception(block.Exception());             \
-        if (UNLIKELY(exceptionState.throwIfNeeded()))                         \
-            return retVal;                                                    \
+    type var;                                                                     \
+    {                                                                             \
+        v8::TryCatch block;                                                       \
+        V8RethrowTryCatchScope rethrow(block);                                    \
+        var = (value);                                                            \
+        if (UNLIKELY(block.HasCaught() || exceptionState.throwIfNeeded()))        \
+            return retVal;                                                        \
     }
 
 // type is an instance of class template V8StringResource<>,