Record the data use by content type

components/data_use_measurement/core/data_use_user_data.h

Index: components/data_use_measurement/core/data_use_user_data.h
diff --git a/components/data_use_measurement/core/data_use_user_data.h b/components/data_use_measurement/core/data_use_user_data.h
index cfae6b9b75c9c6c3e21d295005915ddb3064d387..99ba656b67b815f65ab0f3cff5ccff7991bcc729 100644
--- a/components/data_use_measurement/core/data_use_user_data.h
+++ b/components/data_use_measurement/core/data_use_user_data.h
@@ -52,6 +52,27 @@ class DataUseUserData : public base::SupportsUserData::Data {
     UPDATE_CLIENT,
   };
 
+  // Data use broken by content type. This enum must remain synchronized
+  // with the enum of the same name in metrics/histograms/histograms.xml.
+  // These values are written to logs.  New enum values can be added, but
+  // existing enums must never be renumbered or deleted and reused.
+  enum DataUseContentType {
+    OTHER = 0,
+    MAIN_FRAME_HTML = 1,
+    NON_MAIN_FRAME_HTML = 2,
+    CSS = 3,
+    IMAGE = 4,
+    JAVASCRIPT = 5,
+    FONT = 6,
+    AUDIO_APPBACKGROUND = 7,
+    AUDIO_TABBACKGROUND = 8,
+    AUDIO = 9,
+    VIDEO_APPBACKGROUND = 10,
+    VIDEO_TABBACKGROUND = 11,
+    VIDEO = 12,
+    TYPE_MAX = 13,
+  };
+
   // The state of the application. Only available on Android and on other
   // platforms it is always FOREGROUND.
   enum AppState { UNKNOWN, BACKGROUND, FOREGROUND };
@@ -78,6 +99,12 @@ class DataUseUserData : public base::SupportsUserData::Data {
 
   void set_app_state(AppState app_state) { app_state_ = app_state; }
 
+  DataUseContentType content_type() { return content_type_; }
+
+  void set_content_type(DataUseContentType content_type) {
+    content_type_ = content_type;
+  }
+
   // The key for retrieving back this type of user data.
   static const void* const kUserDataKey;
 
@@ -87,6 +114,8 @@ class DataUseUserData : public base::SupportsUserData::Data {
   // App state when network access was performed for the request previously.
   AppState app_state_;
 
+  DataUseContentType content_type_;
+
   DISALLOW_COPY_AND_ASSIGN(DataUseUserData);
 };