cc: Use SkMScalar instead of doubles everywhere in cc

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 686efc3695cdabacd36546ffaeb97d6db6c51db5..179dbb94eb94a3dbe8680cacb05ddf02bde08304 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -2206,7 +2206,7 @@ TEST_F(LayerTreeHostImplTest, ScrollNonAxisAlignedRotatedLayer) {
     // Scroll down in screen coordinates with a gesture.
     gfx::Vector2d gesture_scroll_delta(0, 10);
     EXPECT_EQ(InputHandler::ScrollStarted,
-              host_impl_->ScrollBegin(gfx::Point(),
+              host_impl_->ScrollBegin(gfx::Point(1, 1),

[danakj, 2013/09/09 17:57:45]

Why is this needed? Can you add a comment explaining?

[enne (OOO), 2013/09/10 22:32:32]

Yeah, when this is floating point the origin no longer hits the rotated
scrolling layer.  1, 1 is a little bit off the layer's corner and into the
scrolling layer, and so it hits it.

I'm not sure that a comment would be helpful here.  The test is already pretty
clear about which layer it's scrolling, and it's just picking a point that's
more guaranteed to hit that layer.  Did you have something in mind?

                                       InputHandler::Gesture));
     host_impl_->ScrollBy(gfx::Point(), gesture_scroll_delta);
     host_impl_->ScrollEnd();
@@ -2231,7 +2231,7 @@ TEST_F(LayerTreeHostImplTest, ScrollNonAxisAlignedRotatedLayer) {
         gfx::Vector2dF());
     gfx::Vector2d gesture_scroll_delta(10, 0);
     EXPECT_EQ(InputHandler::ScrollStarted,
-              host_impl_->ScrollBegin(gfx::Point(),
+              host_impl_->ScrollBegin(gfx::Point(1, 1),
                                       InputHandler::Gesture));
     host_impl_->ScrollBy(gfx::Point(), gesture_scroll_delta);
     host_impl_->ScrollEnd();