Infrastructure for temportarily relinquishing GPU resources.

ui/ozone/public/gpu_platform_support.cc

Index: ui/ozone/public/gpu_platform_support.cc
diff --git a/ui/ozone/public/gpu_platform_support.cc b/ui/ozone/public/gpu_platform_support.cc
index 4b7f52758495c7b5655da1209a79b63a85c01164..60c74b0a324561fed3cb3adabe9eb7e48f20cab3 100644
--- a/ui/ozone/public/gpu_platform_support.cc
+++ b/ui/ozone/public/gpu_platform_support.cc
@@ -27,6 +27,10 @@ GpuPlatformSupport::GpuPlatformSupport() {
 GpuPlatformSupport::~GpuPlatformSupport() {
 }
 
+void GpuPlatformSupport::RelinquishGpuResources(const base::Closure& callback) {
+  callback.Run();
+}
+
 GpuPlatformSupport* CreateStubGpuPlatformSupport() {
   return new StubGpuPlatformSupport;
 }