Don't invert contentsDeviceTransform twice when rendering render passes.

cc/gl_renderer.h

Index: cc/gl_renderer.h
diff --git a/cc/gl_renderer.h b/cc/gl_renderer.h
index c47eefda49f7db183ed47dce2a4042f5d37f2b6f..512c48438df93c1837c93fa0b34cdfda1dae827f 100644
--- a/cc/gl_renderer.h
+++ b/cc/gl_renderer.h
@@ -91,7 +91,10 @@ private:
 
     void drawCheckerboardQuad(const DrawingFrame&, const CheckerboardDrawQuad*);
     void drawDebugBorderQuad(const DrawingFrame&, const DebugBorderDrawQuad*);
-    scoped_ptr<ScopedTexture> drawBackgroundFilters(DrawingFrame&, const RenderPassDrawQuad*, const WebKit::WebFilterOperations&, const WebKit::WebTransformationMatrix& deviceTransform);
+    scoped_ptr<ScopedTexture> drawBackgroundFilters(
+        DrawingFrame&, const RenderPassDrawQuad*, const WebKit::WebFilterOperations&,
+        const WebKit::WebTransformationMatrix& contentsDeviceTransform,
+        const WebKit::WebTransformationMatrix& contentsDeviceTransformInverse);
     void drawRenderPassQuad(DrawingFrame&, const RenderPassDrawQuad*);
     void drawSolidColorQuad(const DrawingFrame&, const SolidColorDrawQuad*);
     void drawStreamVideoQuad(const DrawingFrame&, const StreamVideoDrawQuad*);