Page popups should respect zoom factor of the anchor element.

third_party/WebKit/Source/core/page/PagePopupClient.h

Index: third_party/WebKit/Source/core/page/PagePopupClient.h
diff --git a/third_party/WebKit/Source/core/page/PagePopupClient.h b/third_party/WebKit/Source/core/page/PagePopupClient.h
index f61be1ddf38975deb497d7fba7a6936880d77106..dd0cd617ebd7ee13b8e16e809df0c81bb3ecd25e 100644
--- a/third_party/WebKit/Source/core/page/PagePopupClient.h
+++ b/third_party/WebKit/Source/core/page/PagePopupClient.h
@@ -56,6 +56,9 @@ public:
     virtual void selectFontsFromOwnerDocument(Document&) = 0;
 
     virtual Element& ownerElement() = 0;
+    // Returns effective zoom factor of ownerElement, or the page zoom factor if
+    // the effective zoom factor is not available.
+    float zoomFactor();
     // Returns a Locale object associated to the client.
     virtual Locale& locale() = 0;