Clean up and modernize the feedback code

components/feedback/feedback_common.h

Index: components/feedback/feedback_common.h
diff --git a/components/feedback/feedback_common.h b/components/feedback/feedback_common.h
index 7c6d56da19e5063843cf083f32fc029443c1a1bb..2f4016e956852b020f4843deb8319c1c69a717b0 100644
--- a/components/feedback/feedback_common.h
+++ b/components/feedback/feedback_common.h
@@ -12,27 +12,21 @@
 #include <memory>
 #include <string>
 #include <utility>
+#include <vector>
 
 #include "base/files/file_util.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_vector.h"
 #include "base/synchronization/lock.h"
 
 namespace userfeedback {
 class ExtensionSubmit;
 }
 
-namespace feedback_util {
-bool ZipString(const base::FilePath& filename,
-               const std::string& data,
-               std::string* compressed_data);
-}
-
 // This is the base class for FeedbackData. It primarily knows about
 // data common to all feedback reports and how to zip things.
 class FeedbackCommon : public base::RefCountedThreadSafe<FeedbackCommon> {
  public:
-  typedef std::map<std::string, std::string> SystemLogsMap;
+  using SystemLogsMap = std::map<std::string, std::string>;
 
   struct AttachedFile {
     explicit AttachedFile(const std::string& filename,
@@ -43,23 +37,12 @@ class FeedbackCommon : public base::RefCountedThreadSafe<FeedbackCommon> {
     std::unique_ptr<std::string> data;
   };
 
-  // Determine if the given feedback value is small enough to not need to
-  // be compressed.
-  static bool BelowCompressionThreshold(const std::string& content);
-
   FeedbackCommon();
 
-  void CompressFile(const base::FilePath& filename,
-                    const std::string& zipname,
-                    std::unique_ptr<std::string> data);
   void AddFile(const std::string& filename, std::unique_ptr<std::string> data);
 
   void AddLog(const std::string& name, const std::string& value);
   void AddLogs(std::unique_ptr<SystemLogsMap> logs);
-  void CompressLogs();
-
-  void AddFilesAndLogsToReport(
-      userfeedback::ExtensionSubmit* feedback_data) const;
 
   // Fill in |feedback_data| with all the data that we have collected.
   // CompressLogs() must have already been called.
@@ -76,7 +59,9 @@ class FeedbackCommon : public base::RefCountedThreadSafe<FeedbackCommon> {
   std::string user_agent() const { return user_agent_; }
   std::string locale() const { return locale_; }
 
-  const AttachedFile* attachment(size_t i) const { return attachments_[i]; }
+  const AttachedFile* attachment(size_t i) const {
+    return attachments_[i].get();
+  }
   size_t attachments() const { return attachments_.size(); }
 
   // Setters
@@ -102,10 +87,22 @@ class FeedbackCommon : public base::RefCountedThreadSafe<FeedbackCommon> {
  protected:
   virtual ~FeedbackCommon();
 
+  // Compresses the |data_to_be_compressed| to an attachment file to this
+  // feedback data with name |zipname|. If |zipname| is empty, the |filename|
+  // will be used and appended a ".zip" extension.
+  void CompressFile(const base::FilePath& filename,
+                    const std::string& zipname,
+                    std::unique_ptr<std::string> data_to_be_compressed);
+
+  void CompressLogs();
+
  private:
   friend class base::RefCountedThreadSafe<FeedbackCommon>;
   friend class FeedbackCommonTest;
 
+  void AddFilesAndLogsToReport(
+      userfeedback::ExtensionSubmit* feedback_data) const;
+
   // Returns true if a product ID was set in the feedback report.
   bool HasProductId() const { return product_id_ != -1; }
 
@@ -122,7 +119,7 @@ class FeedbackCommon : public base::RefCountedThreadSafe<FeedbackCommon> {
   // It is possible that multiple attachment add calls are running in
   // parallel, so synchronize access.
   base::Lock attachments_lock_;
-  ScopedVector<AttachedFile> attachments_;
+  std::vector<std::unique_ptr<AttachedFile>> attachments_;
 
   std::unique_ptr<SystemLogsMap> logs_;
 };