Factor GrTexture into public GrTexture and private GrTextureImpl.

src/gpu/gl/GrGLTexture.h

Index: src/gpu/gl/GrGLTexture.h
diff --git a/src/gpu/gl/GrGLTexture.h b/src/gpu/gl/GrGLTexture.h
index 62052fd16abb0f17e1af4bb008a4c0c32d0b807c..a8800fab55b0f384f5f0565d071ac53c1158d245 100644
--- a/src/gpu/gl/GrGLTexture.h
+++ b/src/gpu/gl/GrGLTexture.h
@@ -45,7 +45,7 @@ private:
 ////////////////////////////////////////////////////////////////////////////////
 
 
-class GrGLTexture : public GrTexture {
+class GrGLTexture : public GrTextureImpl {
 
 public:
     struct TexParams {
@@ -75,7 +75,7 @@ public:
 
     virtual GrBackendObject getTextureHandle() const SK_OVERRIDE;
 
-    virtual void invalidateCachedState() SK_OVERRIDE { fTexParams.invalidate(); }
+    virtual void textureParamsModified() SK_OVERRIDE { fTexParams.invalidate(); }
 
     // These functions are used to track the texture parameters associated with the texture.
     const TexParams& getCachedTexParams(GrGpu::ResetTimestamp* timestamp) const {
@@ -105,7 +105,7 @@ private:
               const Desc& textureDesc,
               const GrGLRenderTarget::Desc* rtDesc);
 
-    typedef GrTexture INHERITED;
+    typedef GrTextureImpl INHERITED;
 };
 
 #endif