Hide scrollbars when their dimensions are not scrollable.

cc/layers/scrollbar_layer_impl_base.cc

Index: cc/layers/scrollbar_layer_impl_base.cc
diff --git a/cc/layers/scrollbar_layer_impl_base.cc b/cc/layers/scrollbar_layer_impl_base.cc
index 5e5e279fa254ed1222791095d8506ada832853f8..b11e981e80901ed5f2bd161b2b3d95d450ff4c6a 100644
--- a/cc/layers/scrollbar_layer_impl_base.cc
+++ b/cc/layers/scrollbar_layer_impl_base.cc
@@ -122,6 +122,12 @@ bool ScrollbarLayerImplBase::SetMaximum(int maximum) {
   return true;
 }
 
+bool ScrollbarLayerImplBase::can_scroll_orientation() const {

[danakj, 2014/10/15 15:39:52]

hacker_style functions should be for accessors, and defined in the header file.
If this is defined the .cc file it should NotBeHackerStyle.

[timav, 2014/10/15 18:12:05]

Hi Dana, thank you for pointing this out. So far I have been somewhat confused
as some methods AreLikeThis() while others are_like_this(). Could you, please,
point me to the link that explains why is this, or explain it yourself? Is it
just whether the body appears in .h or .cc?

[danakj, 2014/10/15 18:13:26]

http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Function_Names

+  if (!scroll_layer_)
+    return false;
+  return scroll_layer_->user_scrollable(orientation()) && (0 < maximum());
+}
+
 bool ScrollbarLayerImplBase::SetVerticalAdjust(float vertical_adjust) {
   if (vertical_adjust_ == vertical_adjust)
     return false;