Blacklist partial swaps on linux

ui/gl/gl_surface_x11.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_surface.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 14 matching lines @@
   explicit NativeViewGLSurfaceOSMesa(gfx::AcceleratedWidget window);
 
   static bool InitializeOneOff();
 
   // Implement a subset of GLSurface.
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() OVERRIDE;
   virtual bool Resize(const gfx::Size& new_size) OVERRIDE;
   virtual bool IsOffscreen() OVERRIDE;
   virtual bool SwapBuffers() OVERRIDE;
-  virtual std::string GetExtensions() OVERRIDE;
+  virtual bool SupportsPostSubBuffer() OVERRIDE;
   virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
 
  protected:
   virtual ~NativeViewGLSurfaceOSMesa();
 
  private:
   Display* xdisplay_;
   GC window_graphics_context_;
   gfx::AcceleratedWidget window_;
   GC pixmap_graphics_context_;
@@ skipping 165 matching lines @@
             0,
             0,
             size.width(),
             size.height(),
             0,
             0);
 
   return true;
 }
 
-std::string NativeViewGLSurfaceOSMesa::GetExtensions() {
-  std::string extensions = gfx::GLSurfaceOSMesa::GetExtensions();
-  extensions += extensions.empty() ? "" : " ";
-  extensions += "GL_CHROMIUM_post_sub_buffer";
-  return extensions;
+bool NativeViewGLSurfaceOSMesa::SupportsPostSubBuffer() {
+  return true;
 }
 
 bool NativeViewGLSurfaceOSMesa::PostSubBuffer(
     int x, int y, int width, int height) {
   gfx::Size size = GetSize();
 
   // Move (0,0) from lower-left to upper-left
   y = size.height() - y - height;
 
   XWindowAttributes attributes;
@@ skipping 99 matching lines @@
     }
     case kGLImplementationMockGL:
       return new GLSurfaceStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx