Use a status_t return type for GL functors

WebView needs more fine-grained control over the behavior of the
framework upon execution of the display lists. The new status_t
allows WebView to requests its functor to be re-executed directly
without causing a redraw of the entire hierarchy.

Change-Id: I97a8141dc5c6eeb6805b6024cc1e76fce07d24cc
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index 4d7a491..3ba6202 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -72,7 +72,7 @@
     virtual void interrupt();
     virtual void resume();
 
-    virtual bool callDrawGLFunction(Functor *functor, Rect& dirty);
+    virtual status_t callDrawGLFunction(Functor *functor, Rect& dirty);
 
     ANDROID_API int getSaveCount() const;
     virtual int save(int flags);
@@ -97,7 +97,7 @@
     ANDROID_API bool quickReject(float left, float top, float right, float bottom);
     virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op);
 
-    virtual bool drawDisplayList(DisplayList* displayList, uint32_t width, uint32_t height,
+    virtual status_t drawDisplayList(DisplayList* displayList, uint32_t width, uint32_t height,
             Rect& dirty, int32_t flags, uint32_t level = 0);
     virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0);
     virtual void drawLayer(Layer* layer, float x, float y, SkPaint* paint);