Fixes for iOS / Ganesh (consistent fs/vs uni precision decl and don't use stencil-only fbo for clear)

Review URL: http://codereview.appspot.com/4850043/


git-svn-id: http://skia.googlecode.com/svn/trunk@2050 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGpuGL.h b/gpu/src/GrGpuGL.h
index 6dbc9d7..0f0181c 100644
--- a/gpu/src/GrGpuGL.h
+++ b/gpu/src/GrGpuGL.h
@@ -70,8 +70,6 @@
 
     // GrGpu overrides
     virtual void resetContext();
-    virtual void abandonResources();
-    virtual void releaseResources();
 
     virtual GrTexture* onCreateTexture(const GrTextureDesc& desc,
                                        const void* srcData,
@@ -104,7 +102,7 @@
                                      uint32_t vertexCount,
                                      uint32_t numVertices);
     virtual void flushScissor(const GrIRect* rect);
-    void clearStencil(uint32_t value, uint32_t mask);
+    virtual void clearStencil();
     virtual void clearStencilClip(const GrIRect& rect);
     virtual int getMaxEdges() const;