| diff --git a/ui/gl/gl_surface.cc b/ui/gl/gl_surface.cc |
| index e1369e5..f4cb61c 100644 |
| --- a/ui/gl/gl_surface.cc |
| +++ b/ui/gl/gl_surface.cc |
| @@ -28,7 +28,7 @@ base::LazyInstance<base::ThreadLocalPointer<GLSurface> >::Leaky |
| } // namespace |
| |
| // static |
| -bool GLSurface::InitializeOneOff() { |
| +bool GLSurface::InitializeOneOff(GLImplementation impl) { |
| DCHECK_EQ(kGLImplementationNone, GetGLImplementation()); |
| |
| TRACE_EVENT0("gpu", "GLSurface::InitializeOneOff"); |
| @@ -40,7 +40,8 @@ bool GLSurface::InitializeOneOff() { |
| base::CommandLine* cmd = base::CommandLine::ForCurrentProcess(); |
| |
| // The default implementation is always the first one in list. |
| - GLImplementation impl = allowed_impls[0]; |
| + if (impl == kGLImplementationNone) |
| + impl = allowed_impls[0]; |
| bool fallback_to_osmesa = false; |
| if (cmd->HasSwitch(switches::kOverrideUseGLWithOSMesaForTests)) { |
| impl = kGLImplementationOSMesaGL; |
| diff --git a/ui/gl/gl_surface.h b/ui/gl/gl_surface.h |
| index 8993845..220bda6 100644 |
| --- a/ui/gl/gl_surface.h |
| +++ b/ui/gl/gl_surface.h |
| @@ -96,7 +96,7 @@ class GL_EXPORT GLSurface : public base::RefCounted<GLSurface> { |
| const SwapCompletionCallback& callback); |
| |
| // Initialize GL bindings. |
| - static bool InitializeOneOff(); |
| + static bool InitializeOneOff(GLImplementation = kGLImplementationNone); |
| |
| // Unit tests should call these instead of InitializeOneOff() to set up |
| // GL bindings appropriate for tests. |
