Early wait on texture resource sync points in gl_renderer.

cc/output/software_renderer.h

Index: cc/output/software_renderer.h
diff --git a/cc/output/software_renderer.h b/cc/output/software_renderer.h
index 5c9fef0ba57d9cf94cb08428c004b5d716a44eb7..eb77a062c2253f10abddea2c543dbb7769faaab0 100644
--- a/cc/output/software_renderer.h
+++ b/cc/output/software_renderer.h
@@ -54,6 +54,8 @@ class CC_EXPORT SoftwareRenderer : public DirectRenderer {
                              bool draw_rect_covers_full_surface) OVERRIDE;
   virtual void ClearFramebuffer(DrawingFrame* frame,
                                 bool has_external_stencil_test) OVERRIDE;
+  virtual void DoPrelockQuad(DrawingFrame* frame,
+                             const DrawQuad* quad) OVERRIDE;
   virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) OVERRIDE;
   virtual void BeginDrawingFrame(DrawingFrame* frame) OVERRIDE;
   virtual void FinishDrawingFrame(DrawingFrame* frame) OVERRIDE;