Add resource provider flag to avoid client-side buffers

src/gpu/gl/GrGLBuffer.h

Index: src/gpu/gl/GrGLBuffer.h
diff --git a/src/gpu/gl/GrGLBuffer.h b/src/gpu/gl/GrGLBuffer.h
index 84d05be382b74e1641e0e4c5da231362c3a56880..6a90d0334c79b78b75b484f879549baa9a16caf9 100644
--- a/src/gpu/gl/GrGLBuffer.h
+++ b/src/gpu/gl/GrGLBuffer.h
@@ -25,7 +25,6 @@ public:
     }
 
     GrGLuint bufferID() const { return fBufferID; }
-    size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
 
     /**
      * Returns the actual size of the underlying GL buffer object. In certain cases we may make this
@@ -37,8 +36,7 @@ public:
     bool hasAttachedToTexture() const { return fHasAttachedToTexture; }
 
 protected:
-    GrGLBuffer(GrGLGpu*, size_t size, GrBufferType intendedType, GrAccessPattern, bool cpuBacked,
-               const void* data);
+    GrGLBuffer(GrGLGpu*, size_t size, GrBufferType intendedType, GrAccessPattern, const void* data);
 
     void onAbandon() override;
     void onRelease() override;
@@ -57,10 +55,8 @@ private:
     void validate() const;
 #endif
 
-    void*          fCPUData;
     GrBufferType   fIntendedType;
     GrGLuint       fBufferID;
-    size_t         fSizeInBytes;
     GrGLenum       fUsage;
     size_t         fGLSizeInBytes;
     bool           fHasAttachedToTexture;