Define Chromoting's differ block size in one (and only one) place.

remoting/host/differ.cc

 // Copyright (c) 2011 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 "remoting/host/differ.h"
 
 #include "base/logging.h"
 #include "remoting/host/differ_block.h"
 
 namespace remoting {
@@ skipping 87 matching lines @@
   // If the screen height is not a multiple of the block size, then this
   // handles the last partial row. This situation is far more common than the
   // 'partial column' case.
   if (partial_row_height != 0) {
     const uint8* prev_block = prev_block_row_start;
     const uint8* curr_block = curr_block_row_start;
     DiffInfo* diff_info = diff_info_row_start;
     for (int x = 0; x < x_full_blocks; x++) {
       *diff_info = DiffPartialBlock(prev_block, curr_block,
                                     bytes_per_row_,
-                                    kBlockWidth, partial_row_height);
+                                    kBlockSize, partial_row_height);
       prev_block += block_x_offset;
       curr_block += block_x_offset;
       diff_info += sizeof(DiffInfo);
     }
     if (partial_column_width != 0) {
       *diff_info = DiffPartialBlock(prev_block, curr_block, bytes_per_row_,
                                     partial_column_width, partial_row_height);
       diff_info += sizeof(DiffInfo);
     }
   }
@@ skipping 82 matching lines @@
       // Increment to next block in this row.
       diff_info++;
     }
 
     // Go to start of next row.
     diff_info_row_start += diff_info_stride;
   }
 }
 
 }  // namespace remoting