Refactor CopyTextureCHROMIUM internalformat validation

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 87 matching lines @@
     default:
       NOTREACHED();
       break;
   }
   return id;
 }
 
 // Returns the correct fragment shader id to evaluate the copy operation for
 // the premultiply alpha pixel store settings and target.
 ShaderId GetFragmentShaderId(bool premultiply_alpha,
-                                     bool unpremultiply_alpha,
-                                     GLenum target,
-                                     GLenum source_format,
-                                     GLenum dest_format) {
+                             bool unpremultiply_alpha,
+                             GLenum target,
+                             GLenum source_format,
+                             GLenum dest_format) {
   unsigned alphaIndex = 0;
   unsigned targetIndex = 0;
   unsigned sourceFormatIndex = 0;
   unsigned destFormatIndex = 0;
 
   alphaIndex = (premultiply_alpha   ? (1 << 0) : 0) |
                (unpremultiply_alpha ? (1 << 1) : 0);
 
   switch (target) {
     case GL_TEXTURE_2D:
@@ skipping 1025 matching lines @@
   decoder->RestoreTextureUnitBindings(0);
   decoder->RestoreActiveTexture();
   decoder->RestoreProgramBindings();
   decoder->RestoreBufferBindings();
   decoder->RestoreFramebufferBindings();
   decoder->RestoreGlobalState();
 }
 
 }  // namespace gles2
 }  // namespace gpu