Update GPU memory buffers to use StrideInBytes internally.

ui/gl/gl_image_shared_memory.cc

Index: ui/gl/gl_image_shared_memory.cc
diff --git a/ui/gl/gl_image_shared_memory.cc b/ui/gl/gl_image_shared_memory.cc
index 0bbf54910fcc9c9fe7391954f8c9adcb1e8434c5..a1fc3a72a8f3b3c2febfa8a58bc360c33952edc2 100644
--- a/ui/gl/gl_image_shared_memory.cc
+++ b/ui/gl/gl_image_shared_memory.cc
@@ -17,8 +17,8 @@ bool SizeInBytes(const gfx::Size& size,
                  size_t* size_in_bytes) {
   if (size.IsEmpty())
     return false;
-  base::CheckedNumeric<size_t> s = GLImageMemory::BytesPerPixel(format);
-  s *= size.width();
+  base::CheckedNumeric<size_t> s =
+      GLImageMemory::StrideInBytes(size.width(), format);
   s *= size.height();
   if (!s.IsValid())
     return false;