Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/command_buffer/service/image_factory.cc

Index: gpu/command_buffer/service/image_factory.cc
diff --git a/gpu/command_buffer/service/image_factory.cc b/gpu/command_buffer/service/image_factory.cc
index 8990bb188cc804aec07b08ded8ba85c39e888903..7773a23a30aa82323d14dcf20b58cd5643c4cd09 100644
--- a/gpu/command_buffer/service/image_factory.cc
+++ b/gpu/command_buffer/service/image_factory.cc
@@ -4,6 +4,8 @@
 
 #include "gpu/command_buffer/service/image_factory.h"
 
+#include "ui/gl/gl_image.h"
+
 namespace gpu {
 
 ImageFactory::ImageFactory() {
@@ -12,4 +14,21 @@ ImageFactory::ImageFactory() {
 ImageFactory::~ImageFactory() {
 }
 
+scoped_refptr<gl::GLImage> ImageFactory::CreateAnonymousImage(
+    const gfx::Size& size,
+    gfx::BufferFormat format,
+    unsigned internalformat) {
+  NOTREACHED();
+  return nullptr;
+}
+
+unsigned ImageFactory::RequiredTextureType() {
+  NOTREACHED();

[piman, 2016/06/27 22:46:15]

nit: this is reached on !mac if the client requests GMB backbuffers.
NOTIMPLEMENTED() instead?

[erikchen, 2016/06/28 01:38:42]

Done.

+  return 0;
+}
+
+bool ImageFactory::SupportsFormatRGB() {
+  return true;
+}
+
 }  // namespace gpu