Blacklist partial swaps on linux

ui/gl/gl_surface_win.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 <dwmapi.h>
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 15 matching lines @@
 class NativeViewGLSurfaceOSMesa : public GLSurfaceOSMesa {
  public:
   explicit NativeViewGLSurfaceOSMesa(gfx::AcceleratedWidget window);
   virtual ~NativeViewGLSurfaceOSMesa();
 
   // Implement subset of GLSurface.
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() 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;
 
  private:
   gfx::AcceleratedWidget window_;
   HDC device_context_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewGLSurfaceOSMesa);
 };
 
 class DWMVSyncProvider : public VSyncProvider {
@@ skipping 117 matching lines @@
                 0, 0, size.width(), size.height(),
                 0, 0, size.width(), size.height(),
                 GetHandle(),
                 reinterpret_cast<BITMAPINFO*>(&info),
                 DIB_RGB_COLORS,
                 SRCCOPY);
 
   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) {
   DCHECK(device_context_);
 
   gfx::Size size = GetSize();
 
   // Note: negating the height below causes GDI to treat the bitmap data as row
   // 0 being at the top.
@@ skipping 93 matching lines @@
     }
     case kGLImplementationMockGL:
       return new GLSurfaceStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx