Update GPU memory buffers to use StrideInBytes internally.

ui/gl/gl_image_memory.h

Index: ui/gl/gl_image_memory.h
diff --git a/ui/gl/gl_image_memory.h b/ui/gl/gl_image_memory.h
index fd659e76e58b221b91dcddff360ae6fe8a377723..e599f474504a9365515ce95274fc7e53832d629a 100644
--- a/ui/gl/gl_image_memory.h
+++ b/ui/gl/gl_image_memory.h
@@ -21,7 +21,8 @@ class GL_EXPORT GLImageMemory : public GLImage {
  public:
   GLImageMemory(const gfx::Size& size, unsigned internalformat);
 
-  static size_t BytesPerPixel(gfx::GpuMemoryBuffer::Format format);
+  static size_t StrideInBytes(
+      size_t width, gfx::GpuMemoryBuffer::Format format);
 
   bool Initialize(const unsigned char* memory,
                   gfx::GpuMemoryBuffer::Format format);