Count visible password fields on a page

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index 7c8ff2c232a2ce5a4ea8f7e50742db16c87cc7b9..980e7c10e81729394cca1b96e7425fcfcccbb07d 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -164,6 +164,13 @@ class CORE_EXPORT LocalFrame final : public Frame,
     return m_instrumentingAgents.get();
   }
 
+  // LocalFrame maintains a counter of visible non-secure password
+  // fields in the frame. Used to notify the embedder when all visible
+  // non-secure passwords fields are no longer visible.
+  void incrementPasswordCount();
+  void decrementPasswordCount();
+  uint64_t passwordCount() const;
+
   // =========================================================================
   // All public functions below this point are candidates to move out of
   // LocalFrame into another class.
@@ -270,6 +277,8 @@ class CORE_EXPORT LocalFrame final : public Frame,
 
   InterfaceProvider* const m_interfaceProvider;
   InterfaceRegistry* const m_interfaceRegistry;
+
+  uint64_t m_passwordCount;

[dcheng, 2016/11/01 18:12:42]

Yeah, let's put this on Document: this *should* get set to zero when it's
detached... but this way we're sure to avoid consistency issues.

Btw, let's just make this an unsigned: renderers can't alloc more than 2GB
anyway, so getting 2^63-1 password elements seems unlikely.

[estark, 2016/11/01 18:32:26]

Done.
Done.

 };
 
 inline void LocalFrame::init() {