Remove code used by --disable-delegated-renderer on Mac

content/browser/renderer_host/compositing_iosurface_transformer_mac.h

-// Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_TRANSFORMER_MAC_H_
-#define CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_TRANSFORMER_MAC_H_
-
-#include <OpenGL/gl.h>
-
-#include "base/basictypes.h"
-#include "content/browser/renderer_host/compositing_iosurface_shader_programs_mac.h"
-#include "ui/gfx/size.h"
-
-namespace gfx {
-class Rect;
-}  // namespace gfx
-
-namespace content {
-
-// Provides useful image filtering operations that are implemented efficiently
-// using OpenGL shader programs.
-//
-// Note: All methods assume to be called within an active OpenGL context.
-class CompositingIOSurfaceTransformer {
- public:
-  // Construct a transformer that always uses the given parameters for texture
-  // bindings.  |texture_target| is one of the valid enums to use with
-  // glBindTexture().
-  // |src_texture_needs_y_flip| is true when the |src_texture| argument to any
-  // of the methods below uses upside-down Y coordinates.
-  // |shader_program_cache| is not owned by this instance.
-  CompositingIOSurfaceTransformer(
-      GLenum texture_target, bool src_texture_needs_y_flip,
-      CompositingIOSurfaceShaderPrograms* shader_program_cache);
-
-  ~CompositingIOSurfaceTransformer();
-
-  // Delete any references to currently-cached OpenGL objects.  This must be
-  // called within the OpenGL context just before destruction.
-  void ReleaseCachedGLObjects();
-
-  // Resize using bilinear interpolation.  Returns false on error.  Otherwise,
-  // the |texture| argument will point to the result.  Ownership of the returned
-  // |texture| remains with CompositingIOSurfaceTransformer (i.e., the caller
-  // must not delete this texture).  The |texture| remains valid until the next
-  // call to ResizeBilinear() or ReleaseCachedGLObjects().
-  //
-  // If the src and dst sizes are identical, this becomes a simple copy into a
-  // new texture.
-  //
-  // Note: This implementation is faulty in that minifications by more than 2X
-  // will undergo aliasing.
-  bool ResizeBilinear(GLuint src_texture, const gfx::Rect& src_subrect,
-                      const gfx::Size& dst_size, GLuint* texture);
-
-  // Color format conversion from RGB to planar YV12 (also known as YUV420).
-  //
-  // YV12 is effectively a twelve bit per pixel format consisting of a full-
-  // size y (luminance) plane and half-width, half-height u and v (blue and
-  // red chrominance) planes.  This method will return three off-screen
-  // textures, one for each plane, via the output arguments |texture_y|,
-  // |texture_u|, and |texture_v|.  While the textures are in GL_RGBA format,
-  // they should be interpreted as the appropriate single-byte, planar format
-  // after reading the pixel data.  The output arguments |packed_y_size| and
-  // |packed_uv_size| follow from these special semantics: They represent the
-  // size of their corresponding texture, if it was to be treated like RGBA
-  // pixel data.  That means their widths are in terms of "quads," where one
-  // quad contains 4 Y (or U or V) pixels.
-  //
-  // Ownership of the returned textures remains with
-  // CompositingIOSurfaceTransformer (i.e., the caller must not delete the
-  // textures).  The textures remain valid until the next call to
-  // TransformRGBToYV12() or ReleaseCachedGLObjects().
-  //
-  // If |src_subrect|'s size does not match |dst_size|, the source will be
-  // bilinearly interpolated during conversion.
-  //
-  // Returns true if successful, and the caller is responsible for deleting the
-  // output textures.
-  bool TransformRGBToYV12(
-      GLuint src_texture, const gfx::Rect& src_subrect,
-      const gfx::Size& dst_size,
-      GLuint* texture_y, GLuint* texture_u, GLuint* texture_v,
-      gfx::Size* packed_y_size, gfx::Size* packed_uv_size);
-
- private:
-  enum CachedTexture {
-    RGBA_OUTPUT = 0,
-    Y_PLANE_OUTPUT,
-    UUVV_INTERMEDIATE,
-    U_PLANE_OUTPUT,
-    V_PLANE_OUTPUT,
-    NUM_CACHED_TEXTURES
-  };
-
-  // If necessary, generate the texture and/or resize it to the given |size|.
-  void PrepareTexture(CachedTexture which, const gfx::Size& size);
-
-  // If necessary, generate a framebuffer object to be used as an intermediate
-  // destination for drawing.
-  void PrepareFramebuffer();
-
-  // Target to bind all input and output textures to (which defines the type of
-  // textures being created and read).  Generally, this is
-  // GL_TEXTURE_RECTANGLE_ARB.
-  const GLenum texture_target_;
-  const bool src_texture_needs_y_flip_;
-  CompositingIOSurfaceShaderPrograms* const shader_program_cache_;
-
-  // Cached OpenGL objects.
-  GLuint textures_[NUM_CACHED_TEXTURES];
-  gfx::Size texture_sizes_[NUM_CACHED_TEXTURES];
-  GLuint frame_buffer_;
-
-  // Auto-detected and set once in the constructor.
-  bool system_supports_multiple_draw_buffers_;
-
-  DISALLOW_COPY_AND_ASSIGN(CompositingIOSurfaceTransformer);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_TRANSFORMER_MAC_H_