Adding status to swap complete

ui/gl/gl_surface_glx.cc

Index: ui/gl/gl_surface_glx.cc
diff --git a/ui/gl/gl_surface_glx.cc b/ui/gl/gl_surface_glx.cc
index 803906093508bd509714136523192d8c6cc20143..a352bbb90f5518d553f139c422e1202305272b49 100644
--- a/ui/gl/gl_surface_glx.cc
+++ b/ui/gl/gl_surface_glx.cc
@@ -496,13 +496,13 @@ bool NativeViewGLSurfaceGLX::IsOffscreen() {
   return false;
 }
 
-bool NativeViewGLSurfaceGLX::SwapBuffers() {
+gfx::SwapResult NativeViewGLSurfaceGLX::SwapBuffers() {
   TRACE_EVENT2("gpu", "NativeViewGLSurfaceGLX:RealSwapBuffers",
       "width", GetSize().width(),
       "height", GetSize().height());
 
   glXSwapBuffers(g_display, GetDrawableHandle());
-  return true;
+  return gfx::SWAP_ACK;
 }
 
 gfx::Size NativeViewGLSurfaceGLX::GetSize() {
@@ -576,11 +576,13 @@ void* NativeViewGLSurfaceGLX::GetConfig() {
   return config_;
 }
 
-bool NativeViewGLSurfaceGLX::PostSubBuffer(
-    int x, int y, int width, int height) {
+gfx::SwapResult NativeViewGLSurfaceGLX::PostSubBuffer(int x,
+                                                      int y,
+                                                      int width,
+                                                      int height) {
   DCHECK(gfx::g_driver_glx.ext.b_GLX_MESA_copy_sub_buffer);
   glXCopySubBufferMESA(g_display, GetDrawableHandle(), x, y, width, height);
-  return true;
+  return gfx::SWAP_ACK;
 }
 
 VSyncProvider* NativeViewGLSurfaceGLX::GetVSyncProvider() {
@@ -662,7 +664,7 @@ bool PbufferGLSurfaceGLX::IsOffscreen() {
 
 bool PbufferGLSurfaceGLX::SwapBuffers() {
   NOTREACHED() << "Attempted to call SwapBuffers on a pbuffer.";
-  return false;
+  return gfx::SWAP_FAILED;
 }
 
 gfx::Size PbufferGLSurfaceGLX::GetSize() {