gpu: Add out-of-line copy ctors for complex classes.

gpu/command_buffer/service/program_manager.h

Index: gpu/command_buffer/service/program_manager.h
diff --git a/gpu/command_buffer/service/program_manager.h b/gpu/command_buffer/service/program_manager.h
index cf98d0ad943e512c472fc9aabd4866ecdddb4323..64e68a4c559b259b0e1138e0e15586f7c16b3cff 100644
--- a/gpu/command_buffer/service/program_manager.h
+++ b/gpu/command_buffer/service/program_manager.h
@@ -86,6 +86,7 @@ class GPU_EXPORT Program : public base::RefCounted<Program> {
 
   struct UniformInfo {
     UniformInfo();
+    UniformInfo(const UniformInfo& other);
     UniformInfo(const std::string& client_name,
                 GLint client_location_base,
                 GLenum _type,