cc: Add CopyAsBitmapRequest class to hold the readback callback.

cc/base/scoped_ptr_vector.h

Index: cc/base/scoped_ptr_vector.h
diff --git a/cc/base/scoped_ptr_vector.h b/cc/base/scoped_ptr_vector.h
index 01f4d3d0fc4ed795eeee78feab7d35839e009d85..8cd368d885ce3f72a2b962c06b2958fa4ba05dec 100644
--- a/cc/base/scoped_ptr_vector.h
+++ b/cc/base/scoped_ptr_vector.h
@@ -33,7 +33,7 @@ class ScopedPtrVector {
   // to methods on the ScopedPtrVector class to appear in the vector.
   class iterator : public std::vector<T*>::iterator {
    public:
-    iterator(const typename std::vector<T*>::iterator& other)
+    iterator(const typename std::vector<T*>::iterator& other) // NOLINT
         : std::vector<T*>::iterator(other) {}
     T* const& operator*() { return std::vector<T*>::iterator::operator*(); }
   };
@@ -129,6 +129,17 @@ class ScopedPtrVector {
     data_.insert(position, item.release());
   }
 
+  void insert_and_take(iterator position,
+                       ScopedPtrVector<T>& other) {
+    std::vector<T*> tmp_data;
+    for (ScopedPtrVector<T>::iterator it = other.begin();
+         it != other.end();
+         ++it) {
+      tmp_data.push_back(other.take(it).release());
+    }
+    data_.insert(position, tmp_data.begin(), tmp_data.end());
+  }
+
   void swap(ScopedPtrVector<T>& other) {
     data_.swap(other.data_);
   }