fixing epsilion value

cc/trees/layer_tree_host_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/trees/layer_tree_host_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 3200 matching lines @@
                                       InputHandler::NonBubblingGesture));
     EXPECT_EQ(InputHandler::ScrollStarted, host_impl_->FlingScrollBegin());
     host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, 20));
     EXPECT_EQ(gfx::Vector2dF(0.000000f, 17.699997f).ToString(),
               host_impl_->accumulated_root_overscroll().ToString());
 
     host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.02f, -0.01f));
     EXPECT_EQ(gfx::Vector2dF(0.000000f, 17.699997f).ToString(),
               host_impl_->accumulated_root_overscroll().ToString());
     host_impl_->ScrollEnd();
+    // TestCase to check  kEpsilon, which prevents minute values to trigger
+    // gloweffect without reaching edge.
+    EXPECT_EQ(InputHandler::ScrollStarted,
+              host_impl_->ScrollBegin(gfx::Point(0, 0), InputHandler::Wheel));
+    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(-0.12f, 0.1f));
+    EXPECT_EQ(gfx::Vector2dF().ToString(),
+              host_impl_->accumulated_root_overscroll().ToString());
+    host_impl_->ScrollEnd();
   }
 }
 
 class BlendStateCheckLayer : public LayerImpl {
  public:
   static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl,
                                       int id,
                                       ResourceProvider* resource_provider) {
     return scoped_ptr<LayerImpl>(new BlendStateCheckLayer(tree_impl,
                                                           id,
@@ skipping 3033 matching lines @@
   EXPECT_EQ(host_impl_->global_tile_state().hard_memory_limit_in_bytes,
             300u * 1024u * 1024u);
   EXPECT_EQ(host_impl_->global_tile_state().soft_memory_limit_in_bytes,
             150u * 1024u * 1024u);
   EXPECT_EQ(host_impl_->global_tile_state().unused_memory_limit_in_bytes,
             75u * 1024u * 1024u);
 }
 
 }  // namespace
 }  // namespace cc