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

components/drive/service/drive_service_interface.h

Index: components/drive/service/drive_service_interface.h
diff --git a/components/drive/service/drive_service_interface.h b/components/drive/service/drive_service_interface.h
index 51265c67feda35e215799b0a00d8380720ad526e..bfc4439e05f9c40a30d0dec658eedf68c8006baa 100644
--- a/components/drive/service/drive_service_interface.h
+++ b/components/drive/service/drive_service_interface.h
@@ -37,6 +37,7 @@ class DriveServiceObserver {
 // Optional parameters for AddNewDirectory().
 struct AddNewDirectoryOptions {
   AddNewDirectoryOptions();
+  AddNewDirectoryOptions(const AddNewDirectoryOptions& other);
   ~AddNewDirectoryOptions();
 
   // visibility of the new directory.
@@ -58,6 +59,7 @@ struct AddNewDirectoryOptions {
 // MultipartUploadNewFile().
 struct UploadNewFileOptions {
   UploadNewFileOptions();
+  UploadNewFileOptions(const UploadNewFileOptions& other);
   ~UploadNewFileOptions();
 
   // modified_date of the file.
@@ -76,6 +78,7 @@ struct UploadNewFileOptions {
 // MultipartUploadExistingFile().
 struct UploadExistingFileOptions {
   UploadExistingFileOptions();
+  UploadExistingFileOptions(const UploadExistingFileOptions& other);
   ~UploadExistingFileOptions();
 
   // Expected ETag of the file. UPLOAD_ERROR_CONFLICT error is generated when