Use nearest neighbor filtering for non-translated quads

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 "base/compiler_specific.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
 #include "ui/base/ui_export.h"
@@ skipping 55 matching lines @@
   // Applies a transformation on the current transformation
   // (i.e. 'this = transform * this;').
   void ConcatTransform(const Transform& transform);
 
   // Returns true if this is the identity matrix.
   bool IsIdentity() const;
 
   // Returns true if the matrix is either identity or pure translation.
   bool IsIdentityOrTranslation() const;
 
+  // Returns true if the matrix is either identity or pure, non-fractional
+  // translation.
+  bool IsIdentityOrIntegerTranslation() const;
+
   // Returns true if the matrix is has only scaling and translation components.
   bool IsScaleOrTranslation() const;
 
   // Returns true if the matrix has any perspective component that would
   // change the w-component of a homogeneous point.
   bool HasPerspective() const;
 
   // Returns true if this transform is non-singular.
   bool IsInvertible() const;
 
@@ skipping 63 matching lines @@
                               Point3F& point) const;
 
   SkMatrix44 matrix_;
 
   // copy/assign are allowed.
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_H_