Add ability to wire up sharelist in glcontext creation

src/gpu/GrContextFactory.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContextFactory_DEFINED
 #define GrContextFactory_DEFINED
 
@@ skipping 102 matching lines @@
             : fGrContext(grContext), fGLContext(glContext) { }
         GrContext* fGrContext;
         SkGLContext* fGLContext; //! Valid until the factory destroys it via abandonContexts() or
                                  //! destroyContexts().
     };
 
     /**
      * Get a context initialized with a type of GL context. It also makes the GL context current.
      */
     ContextInfo getContextInfo(GLContextType type,
-                               GLContextOptions options = kNone_GLContextOptions);
+                               GLContextOptions options = kNone_GLContextOptions,
+                               SkGLContext* shareList = nullptr);

[bsalomon, 2016/01/19 22:00:57]

Does this really need to be part of GrContextFactory? I don't think our other
tools need it and the implementation in the cpp doesn't really work correctly.

[joshualitt, 2016/01/20 14:36:56]

Acknowledged.

     /**
      * Get a GrContext initialized with a type of GL context. It also makes the GL context current.
      */
     GrContext* get(GLContextType type,
                    GLContextOptions options = kNone_GLContextOptions) {
         return this->getContextInfo(type, options).fGrContext;
     }
     const GrContextOptions& getGlobalOptions() const { return fGlobalOptions; }
 
 private:
     struct Context {
         GLContextType fType;
         GLContextOptions fOptions;
         SkGLContext*  fGLContext;
         GrContext*    fGrContext;
     };
     SkTArray<Context, true> fContexts;
     const GrContextOptions  fGlobalOptions;
 };
 
 #endif