Reland of Add logic to ResourceProvider to correctly lock GpuMemoryBuffer Resources.

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 31fc686c218082a55fdc99d17459c33ab7811d9e..2f5325ce637a14239a5f4d9315c902ac9983b34a 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -1128,6 +1128,11 @@
   return resource_->gl_id;
 }
 
+ResourceId ResourceProvider::ScopedReadLockGpuMemoryBuffer::GetResourceId()
+    const {
+  return resource_id_;
+}
+
 ResourceProvider::ScopedWriteLockGr::ScopedWriteLockGr(
     ResourceProvider* resource_provider,
     ResourceId resource_id)