cc: Allow 'overflow: hidden' layers to be scrolled again.

cc/layers/layer_impl_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/layer_impl.h"
 
 #include "cc/output/filter_operation.h"
 #include "cc/output/filter_operations.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 548 matching lines @@
   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
   EXPECT_VECTOR_EQ(sent_scroll_delta, layer()->sent_scroll_delta());
 
   layer()->ApplySentScrollDeltasFromAbortedCommit();
 
   EXPECT_VECTOR_EQ(scroll_offset + scroll_delta, layer()->TotalScrollOffset());
   EXPECT_VECTOR_EQ(scroll_offset + sent_scroll_delta, layer()->scroll_offset());
   EXPECT_VECTOR_EQ(gfx::Vector2d(), layer()->sent_scroll_delta());
 }
 
-TEST_F(LayerImplScrollTest, ScrollUserUnscrollableLayer) {
+// The user-scrollability breaks for zoomed-in pages. So disable this.
+// http://crbug.com/322223
+TEST_F(LayerImplScrollTest, DISABLED_ScrollUserUnscrollableLayer) {
   gfx::Vector2d max_scroll_offset(50, 80);
   gfx::Vector2d scroll_offset(10, 5);
   gfx::Vector2dF scroll_delta(20.5f, 8.5f);
 
   layer()->set_user_scrollable_vertical(false);
   layer()->SetMaxScrollOffset(max_scroll_offset);
   layer()->SetScrollOffset(scroll_offset);
   gfx::Vector2dF unscrolled = layer()->ScrollBy(scroll_delta);
 
   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 8.5f), unscrolled);
   EXPECT_VECTOR_EQ(gfx::Vector2dF(30.5f, 5), layer()->TotalScrollOffset());
 }
 
 }  // namespace
 }  // namespace cc