[WASM] Implements catch for the wasm low level exception mechanism.

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <memory>
 #include <queue>
 
@@ skipping 603 matching lines @@
   }
 
   inline Object* scheduled_exception();
   inline bool has_scheduled_exception();
   inline void clear_scheduled_exception();
 
   bool IsJavaScriptHandlerOnTop(Object* exception);
   bool IsExternalHandlerOnTop(Object* exception);
 
   inline bool is_catchable_by_javascript(Object* exception);
+  inline bool is_catchable_by_wasm(Object* exception);
 
   // JS execution stack (see frames.h).
   static Address c_entry_fp(ThreadLocalTop* thread) {
     return thread->c_entry_fp_;
   }
   static Address handler(ThreadLocalTop* thread) { return thread->handler_; }
   Address c_function() { return thread_local_top_.c_function_; }
 
   inline Address* c_entry_fp_address() {
     return &thread_local_top_.c_entry_fp_;
@@ skipping 1038 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_