Revert of Fix (or tag) uses of explicit '64' instead of GL_MAILBOX_SIZE_CHROMIUM

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

Index: content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
index 344b1e8245976ce9e8f7c99846ad828b183a4a5c..cd5cb3fb28fc799a1c192d591b066ec1d14e9337 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
@@ -841,9 +841,7 @@
   frame->metadata.device_scale_factor = scale_factor;
   frame->gl_frame_data.reset(new cc::GLFrameData);
   frame->gl_frame_data->sync_point = 1;
-  memset(frame->gl_frame_data->mailbox.name,
-         '1',
-         sizeof(frame->gl_frame_data->mailbox.name));
+  memset(frame->gl_frame_data->mailbox.name, '1', 64);
   frame->gl_frame_data->size = size;
   frame->gl_frame_data->sub_buffer_rect = damage;
   return frame.Pass();