Rename setVisibility to setVisibilityCHROMIUM and expose as GL_CHROIMIUM_set_visibility extension.

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc

Index: content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc b/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
index 4200c4f0bff20f3955858344a1ea8c8e7e26049a..4f1833be7a83ba8a9a25e1fa12845ed1e67a4bf8 100644
--- a/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
@@ -302,11 +302,6 @@ void WebGraphicsContext3DCommandBufferImpl::reshape(int width, int height) {
 #endif  // FLIP_FRAMEBUFFER_VERTICALLY
 }
 
-void WebGraphicsContext3DCommandBufferImpl::setVisibility(bool visible) {
-  gl_->Flush();
-  context_->SetSurfaceVisible(visible);
-}
-
 #ifdef FLIP_FRAMEBUFFER_VERTICALLY
 void WebGraphicsContext3DCommandBufferImpl::FlipVertically(
     uint8* framebuffer,
@@ -420,6 +415,12 @@ void WebGraphicsContext3DCommandBufferImpl::unmapTexSubImage2DCHROMIUM(
   gl_->UnmapTexSubImage2DCHROMIUM(mem);
 }
 
+void WebGraphicsContext3DCommandBufferImpl::setVisibilityCHROMIUM(
+    bool visible) {
+  gl_->Flush();
+  context_->SetSurfaceVisible(visible);
+}
+
 void WebGraphicsContext3DCommandBufferImpl::copyTextureToParentTextureCHROMIUM(
     WebGLId texture, WebGLId parentTexture) {
   NOTIMPLEMENTED();