ui: Add non-member Vector2dScale() and Vector3dScale() methods to create scaled vectors

cc/layer_tree_host_impl_unittest.cc

Index: cc/layer_tree_host_impl_unittest.cc
diff --git a/cc/layer_tree_host_impl_unittest.cc b/cc/layer_tree_host_impl_unittest.cc
index 3d7e825a2ac2c6e963bb824d063618308d2026a4..b6eff21be809f8a56c8809077a1bc33e99a6314f 100644
--- a/cc/layer_tree_host_impl_unittest.cc
+++ b/cc/layer_tree_host_impl_unittest.cc
@@ -1175,7 +1175,7 @@ TEST_P(LayerTreeHostImplTest, scrollRootAndChangePageScaleOnMainThread)
 
     if (!Settings::pageScalePinchZoomEnabled()) {
         // The scale should apply to the scroll delta.
-        expectedScrollDelta = gfx::ToFlooredVector2d(cc::ScaleVector2d(expectedScrollDelta, pageScale));
+        expectedScrollDelta = gfx::ToFlooredVector2d(gfx::ScaleVector2d(expectedScrollDelta, pageScale));
     }
     scoped_ptr<ScrollAndScaleSet> scrollInfo = m_hostImpl->processScrollDeltas();
     expectContains(*scrollInfo.get(), m_hostImpl->rootLayer()->id(), expectedScrollDelta);
@@ -1298,7 +1298,7 @@ TEST_P(LayerTreeHostImplTest, scrollChildAndChangePageScaleOnMainThread)
 
     if (!Settings::pageScalePinchZoomEnabled()) {
         // The scale should apply to the scroll delta.
-        expectedScrollDelta = gfx::ToFlooredVector2d(cc::ScaleVector2d(expectedScrollDelta, pageScale));
+        expectedScrollDelta = gfx::ToFlooredVector2d(gfx::ScaleVector2d(expectedScrollDelta, pageScale));
     }
     scoped_ptr<ScrollAndScaleSet> scrollInfo = m_hostImpl->processScrollDeltas();
     expectContains(*scrollInfo.get(), scrollLayerId, expectedScrollDelta);