cc: Improve texture per second calculation and overhead

cc/ThrottledTextureUploader.h

Index: cc/ThrottledTextureUploader.h
diff --git a/cc/ThrottledTextureUploader.h b/cc/ThrottledTextureUploader.h
index f51740158d124129061bdd09542ad133a11a0ae0..1b43bb7f3d8998b7da3b626dd92097de1c729095 100644
--- a/cc/ThrottledTextureUploader.h
+++ b/cc/ThrottledTextureUploader.h
@@ -8,7 +8,7 @@
 #include "TextureUploader.h"
 
 #include "base/basictypes.h"
-#include <deque>
+#include <set>
 #include <wtf/Deque.h>
 
 namespace WebKit {
@@ -65,7 +65,8 @@ private:
     WebKit::WebGraphicsContext3D* m_context;
     Deque<OwnPtr<Query> > m_pendingQueries;
     Deque<OwnPtr<Query> > m_availableQueries;
-    std::deque<double> m_texturesPerSecondHistory;
+    std::multiset<double> m_texturesPerSecondHistory;
+    int m_historyRemovalCount;
     size_t m_numBlockingTextureUploads;
 
     DISALLOW_COPY_AND_ASSIGN(ThrottledTextureUploader);