[Fuchsia] Update ImageTransportSurface to use gl::init::CreateViewGLSurface()

Previously ImageTransportSurface was creating GLSurfaceOSMesa, but
that this is wrong because GLSurfaceOSMesa doesn't support
SwapBuffers(). Updated ImageTransportSurface to call
CreateViewGLSurface(), which in turn creates GLSurfaceOSMesaHeadless.
That class handles SwapBuffers() correctly.

Bug: 778467
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I701dd219ad5867359ade613fbb1ea24d722f55f3
Reviewed-on: https://chromium-review.googlesource.com/876993Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#530693}

gpu/ipc/service/image_transport_surface_fuchsia.cc

@@ -6,8 +6,8 @@
 
 #include "base/logging.h"
 #include "ui/gl/gl_surface.h"
-#include "ui/gl/gl_surface_osmesa.h"
 #include "ui/gl/gl_surface_stub.h"
+#include "ui/gl/init/gl_factory.h"
 
 namespace gpu {
 
@@ -16,14 +16,12 @@ scoped_refptr<gl::GLSurface> ImageTransportSurface::CreateNativeSurface(
     base::WeakPtr<ImageTransportSurfaceDelegate> delegate,
     SurfaceHandle surface_handle,
     gl::GLSurfaceFormat format) {
-  if (gl::GetGLImplementation() == gl::kGLImplementationOSMesaGL) {
-    return gl::InitializeGLSurfaceWithFormat(
-        new gl::GLSurfaceOSMesa(format, gfx::Size(1, 1)), format);
+  if (gl::GetGLImplementation() == gl::kGLImplementationMockGL ||
+      gl::GetGLImplementation() == gl::kGLImplementationStubGL) {
+    return new gl::GLSurfaceStub;
   }
 
-  DCHECK(gl::GetGLImplementation() == gl::kGLImplementationMockGL ||
-         gl::GetGLImplementation() == gl::kGLImplementationStubGL);
-  return new gl::GLSurfaceStub;
+  return gl::init::CreateViewGLSurface(surface_handle);
 }
 
 }  // namespace gpu