Add UMA stats to record when DLLs are successfully blocked in the Browser.

chrome_elf/blacklist/blacklist.h

Index: chrome_elf/blacklist/blacklist.h
diff --git a/chrome_elf/blacklist/blacklist.h b/chrome_elf/blacklist/blacklist.h
index 2e21f20793e296cfff766cd3728cf6238f9fe154..d81b1f17667cd57c3a7c24ea94c63fc0f18be68e 100644
--- a/chrome_elf/blacklist/blacklist.h
+++ b/chrome_elf/blacklist/blacklist.h
@@ -74,6 +74,14 @@ extern "C" bool AddDllToBlacklist(const wchar_t* dll_name);
 // removed, false on error.
 extern "C" bool RemoveDllFromBlacklist(const wchar_t* dll_name);
 
+// Returns a list of all the dlls that have been successfully blocked by the
+// blacklist via blocked_dlls, if there is enough space (according to |size|).
+// |size| will always be modify to be the number of dlls that were blocked.

[robertshield, 2014/02/24 15:24:05]

be modified

[csharp, 2014/02/24 21:37:16]

Done.

+extern "C" void SuccessfullyBlocked(const wchar_t** blocked_dlls, int* size);

[robertshield, 2014/02/24 15:24:05]

document the memory management specifics here, i.e.: the caller does not own the
returned strings and is not expected to free them

[csharp, 2014/02/24 21:37:16]

Done.

+
+// Record that the dll at the given index was blocked.
+void BlockedDll(int blocked_index);
+
 // Initializes the DLL blacklist in the current process. This should be called
 // before any undesirable DLLs might be loaded. If |force| is set to true, then
 // initialization will take place even if a beacon is present. This is useful