simple cl to cleanup friends in GrGpu

BUG=skia:

Review URL: https://codereview.chromium.org/709003006
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index 5d31c15..b176d3c 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -111,14 +111,14 @@
         return NULL;
     }
 
-    virtual void onGpuClear(GrRenderTarget*, const SkIRect* rect, GrColor color,
-                            bool canIgnoreRect)  SK_OVERRIDE { }
+    virtual void onClear(GrRenderTarget*, const SkIRect* rect, GrColor color,
+                         bool canIgnoreRect)  SK_OVERRIDE { }
 
     virtual void onClearStencilClip(GrRenderTarget*,
                                     const SkIRect& rect,
                                     bool insideClip)  SK_OVERRIDE { }
 
-    virtual void onGpuDraw(const GrDrawTarget::DrawInfo&)  SK_OVERRIDE { }
+    virtual void onDraw(const GrDrawTarget::DrawInfo&)  SK_OVERRIDE { }
     virtual bool onReadPixels(GrRenderTarget* target,
                               int left, int top, int width, int height,
                               GrPixelConfig,