Create fewer local v8::TryCatch objects in generated bindings code

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 e5841c9beda84810daf9ed7ea80f01cb7aca48cd..1aa5ced3de2ff738a6a903469cdbd743f6d5dddb 100644
--- a/Source/bindings/v8/V8BindingMacros.h
+++ b/Source/bindings/v8/V8BindingMacros.h
@@ -46,15 +46,18 @@ namespace WebCore {
             return block.ReThrow();          \
     }
 
+#define TONATIVE_VOID_INTERNAL(var, value) \
+    var = (value);                        \
+    if (UNLIKELY(block.HasCaught())) {    \
+        block.ReThrow();                  \
+        return;                           \
+    }
+
 #define TONATIVE_VOID(type, var, value)    \
     type var;                              \
     {                                      \
         v8::TryCatch block;                \
-        var = (value);                     \
-        if (UNLIKELY(block.HasCaught())) { \
-            block.ReThrow();               \
-            return;                        \
-        }                                  \
+        TONATIVE_VOID_INTERNAL(var, value); \
     }
 
 #define TONATIVE_DEFAULT(type, var, value, retVal) \
@@ -68,15 +71,18 @@ namespace WebCore {
         }                                          \
     }
 
-#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState) \
-    type var;                                                          \
-    {                                                                  \
-        v8::TryCatch block;                                            \
-        var = (value);                                                 \
-        if (UNLIKELY(block.HasCaught()))                               \
-            exceptionState.rethrowV8Exception(block.Exception());      \
-        if (UNLIKELY(exceptionState.throwIfNeeded()))                  \
-            return;                                                    \
+#define TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState) \
+    var = (value);                                                       \
+    if (UNLIKELY(block.HasCaught()))                                     \
+        exceptionState.rethrowV8Exception(block.Exception());            \
+    if (UNLIKELY(exceptionState.throwIfNeeded()))                        \
+        return;
+
+#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState)    \
+    type var;                                                             \
+    {                                                                     \
+        v8::TryCatch block;                                               \
+        TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState); \
     }
 
 #define TONATIVE_DEFAULT_EXCEPTIONSTATE(type, var, value, exceptionState, retVal) \
@@ -98,6 +104,18 @@ namespace WebCore {
     if (UNLIKELY(!var.prepare()))       \
         return;
 
+#define TOSTRING_VOID_INTERNAL(var, value) \
+    var = (value);                         \
+    if (UNLIKELY(!var.prepare()))          \
+        return;
+
+#define TOSTRING_VOID_INTERNAL_RETHROW(var, value, block) \
+    var = (value);                                        \
+    if (UNLIKELY(!var.prepare())) {                       \
+        block.ReThrow();                                  \
+        return;                                           \
+    }
+
 #define TOSTRING_DEFAULT(type, var, value, retVal) \
     type var(value);                               \
     if (UNLIKELY(!var.prepare()))                  \