Handlify DeoptimizedFrameInfo, remove custom GC iteration.

src/debug/debug-scopes.h

 // Copyright 2015 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_DEBUG_DEBUG_SCOPES_H_
 #define V8_DEBUG_DEBUG_SCOPES_H_
 
 #include "src/debug/debug-frames.h"
 #include "src/frames.h"
 
@@ skipping 78 matching lines @@
   List<Handle<ScopeInfo> > nested_scope_chain_;
   HashMap* non_locals_;
   bool seen_script_scope_;
   bool failed_;
 
   inline JavaScriptFrame* GetFrame() {
     return frame_inspector_->GetArgumentsFrame();
   }
 
   inline Handle<JSFunction> GetFunction() {
-    return Handle<JSFunction>(
-        JSFunction::cast(frame_inspector_->GetFunction()));
+    return Handle<JSFunction>::cast(frame_inspector_->GetFunction());
   }
 
   static bool InternalizedStringMatch(void* key1, void* key2) {
     Handle<String> s1(reinterpret_cast<String**>(key1));
     Handle<String> s2(reinterpret_cast<String**>(key2));
     DCHECK(s1->IsInternalizedString());
     DCHECK(s2->IsInternalizedString());
     return s1.is_identical_to(s2);
   }
 
@@ skipping 30 matching lines @@
                                          Handle<JSObject> scope_object,
                                          KeyCollectionType type);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopeIterator);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_SCOPES_H_