gpu: support R16 GPUMemoryBuffer

ui/gl/test/gl_image_test_support.cc

Index: ui/gl/test/gl_image_test_support.cc
diff --git a/ui/gl/test/gl_image_test_support.cc b/ui/gl/test/gl_image_test_support.cc
index b77b2fd9d3863fd9553c0a50210d3647139f864a..36e26bd8e57d1ce8022ec330b070d11c60bc4fec 100644
--- a/ui/gl/test/gl_image_test_support.cc
+++ b/ui/gl/test/gl_image_test_support.cc
@@ -54,6 +54,7 @@ void GLImageTestSupport::SetBufferDataToColor(int width,
                                               uint8_t* data) {
   switch (format) {
     case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::R_16:

[aleksandar.stojiljkovic, 2017/06/08 14:27:56]

are there any tests using this?

Should be something like:
uint16_t red = (uint16_t)color[0] << 8; 
for (int y = 0; y < height; ++y) {
  uint16_t* row = reinterpret_cast<uint16_t*>(data + y * stride);
  for (int x = 0; x < width; ++x) {
    row[x] = red;
  }
}

[riju_, 2017/06/09 08:20:10]

Thanks.

[riju_, 2017/06/09 08:20:10]

Done.

     case gfx::BufferFormat::RG_88:
       DCHECK_EQ(0, plane);
       for (int y = 0; y < height; ++y) {