WIP cc: remove unused and legacy GetMappedMemoryLimit code.

cc/test/test_web_graphics_context_3d.cc

Index: cc/test/test_web_graphics_context_3d.cc
diff --git a/cc/test/test_web_graphics_context_3d.cc b/cc/test/test_web_graphics_context_3d.cc
index 1e69bcbb8cc98bc4c9c288bd6909289f5c2b8981..6c0e35851dc91733a1d6ba9f3f8ba5765af98f82 100644
--- a/cc/test/test_web_graphics_context_3d.cc
+++ b/cc/test/test_web_graphics_context_3d.cc
@@ -748,12 +748,6 @@ void TestWebGraphicsContext3D::RetireRenderbufferId(GLuint id) {
   namespace_->renderbuffer_set.erase(id);
 }
 
-void TestWebGraphicsContext3D::SetMaxTransferBufferUsageBytes(
-    size_t max_transfer_buffer_usage_bytes) {
-  test_capabilities_.max_transfer_buffer_usage_bytes =
-      max_transfer_buffer_usage_bytes;
-}
-
 void TestWebGraphicsContext3D::SetMaxSamples(int max_samples) {
   test_capabilities_.gpu.max_samples = max_samples;
 }