Adding status to swap complete

ui/gl/gl_surface_egl.cc

Index: ui/gl/gl_surface_egl.cc
diff --git a/ui/gl/gl_surface_egl.cc b/ui/gl/gl_surface_egl.cc
index 61c3c055bd0a573a3d541fd34c6ec054d7bf1507..1de15b352a56e9240d79924160bd39d94b709fb9 100644
--- a/ui/gl/gl_surface_egl.cc
+++ b/ui/gl/gl_surface_egl.cc
@@ -532,7 +532,7 @@ bool NativeViewGLSurfaceEGL::IsOffscreen() {
   return false;
 }
 
-bool NativeViewGLSurfaceEGL::SwapBuffers() {
+gfx::SwapResult NativeViewGLSurfaceEGL::SwapBuffers() {
   TRACE_EVENT2("gpu", "NativeViewGLSurfaceEGL:RealSwapBuffers",
       "width", GetSize().width(),
       "height", GetSize().height());
@@ -575,10 +575,10 @@ bool NativeViewGLSurfaceEGL::SwapBuffers() {
   if (!eglSwapBuffers(GetDisplay(), surface_)) {
     DVLOG(1) << "eglSwapBuffers failed with error "
              << GetLastEGLErrorString();
-    return false;
+    return gfx::SWAP_FAILED;
   }
 
-  return true;
+  return gfx::SWAP_ACK;
 }
 
 gfx::Size NativeViewGLSurfaceEGL::GetSize() {
@@ -637,15 +637,17 @@ bool NativeViewGLSurfaceEGL::SupportsPostSubBuffer() {
   return supports_post_sub_buffer_;
 }
 
-bool NativeViewGLSurfaceEGL::PostSubBuffer(
-    int x, int y, int width, int height) {
+gfx::SwapResult NativeViewGLSurfaceEGL::PostSubBuffer(int x,
+                                                      int y,
+                                                      int width,
+                                                      int height) {
   DCHECK(supports_post_sub_buffer_);
   if (!eglPostSubBufferNV(GetDisplay(), surface_, x, y, width, height)) {
     DVLOG(1) << "eglPostSubBufferNV failed with error "
              << GetLastEGLErrorString();
-    return false;
+    return gfx::SWAP_FAILED;
   }
-  return true;
+  return gfx::SWAP_ACK;
 }
 
 VSyncProvider* NativeViewGLSurfaceEGL::GetVSyncProvider() {
@@ -726,9 +728,9 @@ bool PbufferGLSurfaceEGL::IsOffscreen() {
   return true;
 }
 
-bool PbufferGLSurfaceEGL::SwapBuffers() {
+gfx::SwapResult PbufferGLSurfaceEGL::SwapBuffers() {
   NOTREACHED() << "Attempted to call SwapBuffers on a PbufferGLSurfaceEGL.";
-  return false;
+  return gfx::SWAP_FAILED;
 }
 
 gfx::Size PbufferGLSurfaceEGL::GetSize() {
@@ -812,9 +814,9 @@ bool SurfacelessEGL::IsSurfaceless() const {
   return true;
 }
 
-bool SurfacelessEGL::SwapBuffers() {
+gfx::SwapResult SurfacelessEGL::SwapBuffers() {
   LOG(ERROR) << "Attempted to call SwapBuffers with SurfacelessEGL.";
-  return false;
+  return gfx::SWAP_FAILED;
 }
 
 gfx::Size SurfacelessEGL::GetSize() {