Rename setVisibility to setVisibilityCHROMIUM and expose as GL_CHROIMIUM_set_visibility extension.

webkit/gpu/webgraphicscontext3d_in_process_impl.cc

Index: webkit/gpu/webgraphicscontext3d_in_process_impl.cc
diff --git a/webkit/gpu/webgraphicscontext3d_in_process_impl.cc b/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
index daf6604f3fee4cbb1f001656e391ea4c71dd5aba..93af088a96aaef96896cf454b2ab05012a6df7d4 100644
--- a/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
+++ b/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
@@ -596,9 +596,6 @@ void WebGraphicsContext3DInProcessImpl::ClearRenderTarget() {
     glDisable(GL_DITHER);
 }
 
-void WebGraphicsContext3DInProcessImpl::setVisibility(bool visible) {
-}
-
 #ifdef FLIP_FRAMEBUFFER_VERTICALLY
 void WebGraphicsContext3DInProcessImpl::FlipVertically(
     unsigned char* framebuffer, unsigned int width, unsigned int height) {
@@ -713,6 +710,9 @@ void WebGraphicsContext3DInProcessImpl::unmapTexSubImage2DCHROMIUM(
     const void* mem) {
 }
 
+void WebGraphicsContext3DInProcessImpl::setVisibilityCHROMIUM(bool visible) {
+}
+
 void WebGraphicsContext3DInProcessImpl::copyTextureToParentTextureCHROMIUM(
     WebGLId id, WebGLId id2) {
   NOTIMPLEMENTED();