exclude from cache nodes that are entirely clipped out

Google's real time search has many results outside of an overflow
div that should be ignored by the nav cache. Make it so.

fixes http://b/2298478

1 files changed, 3 insertions, 6 deletions

diff --git a/WebKit/android/nav/CacheBuilder.cpp b/WebKit/android/nav/CacheBuilder.cpp
index 219e4c6..522d381 100644
--- a/WebKit/android/nav/CacheBuilder.cpp
+++ b/WebKit/android/nav/CacheBuilder.cpp
@@ -1197,12 +1197,9 @@ void CacheBuilder::BuildFrame(Frame* root, Frame* frame,
         }
         if (hasClip) {
             if (clip.isEmpty())
-                continue; // skip this node if completely clipped out
-            else if (cachedNode.clip(clip) == false) {
-                cachedNode.setBounds(clip);
-                cachedNode.cursorRings().append(clip);
-                isUnclipped = true;
-            }
+                continue; // skip this node if clip prevents all drawing
+            else if (cachedNode.clip(clip) == false)
+                continue; // skip this node if outside of the clip
         }
         cachedNode.setNavableRects();
         cachedNode.setExport(exported);