compositor-worker: Introduce WebCompositorMutableState

ui/gfx/transform.h

 // Copyright (c) 2012 The Chromium 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 UI_GFX_TRANSFORM_H_
 #define UI_GFX_TRANSFORM_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 22 matching lines @@
   Transform() : matrix_(SkMatrix44::kIdentity_Constructor) {}
 
   // Skips initializing this matrix to avoid overhead, when we know it will be
   // initialized before use.
   Transform(SkipInitialization)
       : matrix_(SkMatrix44::kUninitialized_Constructor) {}
   Transform(const Transform& rhs) : matrix_(rhs.matrix_) {}
   // Initialize with the concatenation of lhs * rhs.
   Transform(const Transform& lhs, const Transform& rhs)
       : matrix_(lhs.matrix_, rhs.matrix_) {}
+  explicit Transform(const SkMatrix44& matrix) : matrix_(matrix) {}
   // Constructs a transform from explicit 16 matrix elements. Elements
   // should be given in row-major order.
   Transform(SkMScalar col1row1,
             SkMScalar col2row1,
             SkMScalar col3row1,
             SkMScalar col4row1,
             SkMScalar col1row2,
             SkMScalar col2row2,
             SkMScalar col3row2,
             SkMScalar col4row2,
@@ skipping 218 matching lines @@
 };
 
 // This is declared here for use in gtest-based unit tests but is defined in
 // the gfx_test_support target. Depend on that to use this in your unit test.
 // This should not be used in production code - call ToString() instead.
 void PrintTo(const Transform& transform, ::std::ostream* os);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_H_