Add new API function: feedbackPrivate.readLogSource

chrome/browser/extensions/api/feedback_private/feedback_private_api.h

Index: chrome/browser/extensions/api/feedback_private/feedback_private_api.h
diff --git a/chrome/browser/extensions/api/feedback_private/feedback_private_api.h b/chrome/browser/extensions/api/feedback_private/feedback_private_api.h
index 3ff94b9c3f70f5f313d42f5b347febf6d19bc50d..d2762638cdc96df95d0714b2961d796c448c5be5 100644
--- a/chrome/browser/extensions/api/feedback_private/feedback_private_api.h
+++ b/chrome/browser/extensions/api/feedback_private/feedback_private_api.h
@@ -12,6 +12,11 @@
 #include "extensions/browser/extension_function.h"
 #include "ui/gfx/geometry/rect.h"
 
+#if defined(OS_CHROMEOS)
+#include "base/time/time.h"
+#include "chrome/browser/extensions/api/feedback_private/log_source_access_manager.h"
+#endif  // defined(OS_CHROMEOS)
+
 namespace extensions {
 
 class FeedbackService;
@@ -23,6 +28,10 @@ class FeedbackPrivateAPI : public BrowserContextKeyedAPI {
 
   FeedbackService* GetService() const;
 
+#if defined(OS_CHROMEOS)
+  LogSourceAccessManager* GetLogSourceAccessManager() { return &manager_; }
+#endif  // defined(OS_CHROMEOS)
+
   void RequestFeedback(const std::string& description_template,
                        const std::string& category_tag,
                        const GURL& page_url);
@@ -48,6 +57,9 @@ class FeedbackPrivateAPI : public BrowserContextKeyedAPI {
 
   content::BrowserContext* const browser_context_;
   FeedbackService* service_;
+#if defined(OS_CHROMEOS)
+  LogSourceAccessManager manager_;
+#endif  // defined(OS_CHROMEOS)
 };
 
 // Feedback strings.
@@ -95,6 +107,40 @@ class FeedbackPrivateGetSystemInformationFunction
   void OnCompleted(std::unique_ptr<system_logs::SystemLogsResponse> sys_info);
 };
 
+// This function only reads from actual log sources on Chrome OS. On other
+// platforms, it just returns EmptyResponse().
+class FeedbackPrivateReadLogSourceFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("feedbackPrivate.readLogSource",
+                             FEEDBACKPRIVATE_READLOGSOURCE);
+
+#if defined(OS_CHROMEOS)
+  // To override the default rate-limiting mechanism of this function, pass in
+  // a TimeDelta representing the desired minimum time between consecutive reads
+  // of a source from an extension. Does not take ownership of |timeout|. When
+  // done testing, call this function again with |timeout|=nullptr to reset to
+  // the default behavior.
+  static void SetRateLimitingTimeoutForTesting(const base::TimeDelta* timeout);
+#endif  // defined(OS_CHROMEOS)
+
+ protected:
+  ~FeedbackPrivateReadLogSourceFunction() override {}
+  ResponseAction Run() override;
+
+ private:
+  // Returns a default response to the API that contains no data. Return this
+  // from Run() when it hits an error case and needs to return early, or on
+  // platforms where the ReadLogSource capability is not supported.
+  ResponseAction EmptyResponse();
+
+#if defined(OS_CHROMEOS)
+  void OnCompleted(api::feedback_private::LogSource source,
+                   int readerId,
+                   bool incremental,
+                   system_logs::SystemLogsResponse* response);
+#endif  // defined(OS_CHROMEOS)
+};
+
 class FeedbackPrivateSendFeedbackFunction
     : public ChromeAsyncExtensionFunction {
  public: