Remove most remaining references to IntRect and FloatRect.

cc/occlusion_tracker.h

Index: cc/occlusion_tracker.h
diff --git a/cc/occlusion_tracker.h b/cc/occlusion_tracker.h
index 2c089d431fe62ea0af0ef59c06f9e7c665d42f04..841dea42e7fc77385aa9f37f9986ed924d82ee0b 100644
--- a/cc/occlusion_tracker.h
+++ b/cc/occlusion_tracker.h
@@ -46,7 +46,7 @@ public:
     OverdrawMetrics& overdrawMetrics() const { return *m_overdrawMetrics.get(); }
 
     // Gives the region of the screen that is not occluded by something opaque.
-    Region computeVisibleRegionInScreen() const { return subtract(Region(cc::IntRect(m_rootTargetRect)), m_stack.last().occlusionInScreen); }
+    Region computeVisibleRegionInScreen() const { return subtract(Region(m_rootTargetRect), m_stack.last().occlusionInScreen); }
 
     void setMinimumTrackingSize(const gfx::Size& size) { m_minimumTrackingSize = size; }