[heap] Remove obsolete constructors from SemiSpaceIterator.

src/heap/spaces.h

 // Copyright 2011 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_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include "src/allocation.h"
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
@@ skipping 2256 matching lines @@
 };
 
 
 // A SemiSpaceIterator is an ObjectIterator that iterates over the active
 // semispace of the heap's new space.  It iterates over the objects in the
 // semispace from a given start address (defaulting to the bottom of the
 // semispace) to the top of the semispace.  New objects allocated after the
 // iterator is created are not iterated.
 class SemiSpaceIterator : public ObjectIterator {
  public:
-  // Create an iterator over the objects in the given space.  If no start
-  // address is given, the iterator starts from the bottom of the space.
-
-  // Iterate over all of allocated to-space.
+  // Create an iterator over the allocated objects in the given to-space.
   explicit SemiSpaceIterator(NewSpace* space);
-  // Iterate over part of allocated to-space, from start to the end
-  // of allocation.
-  SemiSpaceIterator(NewSpace* space, Address start);
-  // Iterate from one address to another in the same semi-space.
-  SemiSpaceIterator(Address from, Address to);
 
   HeapObject* Next() {
     if (current_ == limit_) return NULL;
     if (NewSpacePage::IsAtEnd(current_)) {
       NewSpacePage* page = NewSpacePage::FromLimit(current_);
       page = page->next_page();
       DCHECK(!page->is_anchor());
       current_ = page->area_start();
       if (current_ == limit_) return NULL;
     }
@@ skipping 590 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_SPACES_H_