cc: Switch the DrawQuad enum names to chromium style and remove pragmas

cc/io_surface_draw_quad.h

 // Copyright 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 CC_IO_SURFACE_DRAW_QUAD_H_
 #define CC_IO_SURFACE_DRAW_QUAD_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/cc_export.h"
 #include "cc/draw_quad.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
-#pragma pack(push, 4)
-
 class CC_EXPORT IOSurfaceDrawQuad : public DrawQuad {
 public:
     enum Orientation {
       Flipped,
       Unflipped
     };
 
     static scoped_ptr<IOSurfaceDrawQuad> create(const SharedQuadState*, const gfx::Rect&, const gfx::Size& ioSurfaceSize, unsigned ioSurfaceTextureId, Orientation);
 
     gfx::Size ioSurfaceSize() const { return m_ioSurfaceSize; }
     unsigned ioSurfaceTextureId() const { return m_ioSurfaceTextureId; }
     Orientation orientation() const { return m_orientation; }
 
     static const IOSurfaceDrawQuad* materialCast(const DrawQuad*);
 private:
     IOSurfaceDrawQuad(const SharedQuadState*, const gfx::Rect&, const gfx::Size& ioSurfaceSize, unsigned ioSurfaceTextureId, Orientation);
 
     gfx::Size m_ioSurfaceSize;
     unsigned m_ioSurfaceTextureId;
     Orientation m_orientation;
 };
 
-#pragma pack(pop)
-
 }
 
 #endif  // CC_IO_SURFACE_DRAW_QUAD_H_