DM tweaks

dm/DMTask.h

 #ifndef DMTask_DEFINED
 #define DMTask_DEFINED
 
 #include "DMReporter.h"
 #include "DMGpuSupport.h"
 #include "SkRunnable.h"
 #include "SkTime.h"
 
 // DM will run() these tasks on one of two threadpools.
 // Subclasses can call fail() to mark this task as failed, or make any number of spawnChild() calls
@@ skipping 12 matching lines @@
     virtual bool shouldSkip() const = 0;
     virtual SkString name() const = 0;
 
     // Returns the number of parents above this task.
     // Top-level tasks return 0, their children 1, and so on.
     int depth() const { return fDepth; }
 
 protected:
     Task(Reporter* reporter, TaskRunner* taskRunner);
     Task(const Task& parent);
-    virtual ~Task() {}
+    virtual ~Task();
 
     void start();
     void fail(const char* msg = NULL);
     void finish();
 
     void spawnChildNext(CpuTask* task);  // For now we don't allow GPU child tasks.
 
 private:
     Reporter* fReporter;      // Unowned.
     TaskRunner* fTaskRunner;  // Unowned.
@@ skipping 20 matching lines @@
 
     void run(GrContextFactory&) SK_OVERRIDE;
     virtual void draw(GrContextFactory*) = 0;
 
     void spawnChild(CpuTask* task);
 };
 
 }  // namespace DM
 
 #endif  // DMTask_DEFINED