Prepare ClearBrowsingDataDialogFragment for browsing data counters.

chrome/browser/browsing_data/browsing_data_counter_utils.h

Index: chrome/browser/browsing_data/browsing_data_counter_utils.h
diff --git a/chrome/browser/browsing_data/browsing_data_counter_utils.h b/chrome/browser/browsing_data/browsing_data_counter_utils.h
index df73472af15951eedee577206eb47fb5a86436df..8b95d30e1cdc950c8d5e84f4d14446fd41f3bb9d 100644
--- a/chrome/browser/browsing_data/browsing_data_counter_utils.h
+++ b/chrome/browser/browsing_data/browsing_data_counter_utils.h
@@ -15,6 +15,25 @@ bool AreCountersEnabled();
 base::string16 GetCounterTextFromResult(
     const BrowsingDataCounter::Result* result);
 
+// Browsing data types as seen in the Android UI.
+//
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser
+enum ClankBrowsingDataType {

[newt (away), 2016/01/12 18:55:26]

Don't use the word "clank" in code. How about just "BrowsingDataType" (or
"BrowsingDataTypeAndroid" if this isn't applicable to other platforms)?

[msramek, 2016/01/13 15:27:53]

Done. Yes, I wasn't sure about that, but I found some occurrences of "Clank" in
the code, so I assumed it was OK.

I'll remove the "Android" part altogether to reference that this should be
reused on Desktop and later iOS as well (see the comment in
pref_service_bridge.cc).

+  HISTORY,
+  CACHE,
+  COOKIES,
+  PASSWORDS,
+  FORM_DATA,
+  BOOKMARKS,
+  NUM_TYPES = BOOKMARKS

[newt (away), 2016/01/12 18:55:26]

remove " = BOOKMARKS". In this case, BOOKMARKS will be 5, and NUM_TYPES should
be 6.

[msramek, 2016/01/13 15:27:53]

Ah, of course.

+};
+
+// Copies the name of the deletion preference corresponding to the given
+// |data_type| to |out_pref|. Returns false if no such preference exists.
+bool GetDeletionPreferenceFromDataType(
+    ClankBrowsingDataType data_type, std::string* out_pref);
+
 // Creates a new instance of BrowsingDataCounter that is counting the data
 // related to a given deletion preference |pref_name|.
 BrowsingDataCounter* CreateCounterForPreference(std::string pref_name);