Revert of Don't allow nullptr in texels array params (unless using a transfer buffer).

src/gpu/GrGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGpu_DEFINED
 #define GrGpu_DEFINED
 
@@ skipping 78 matching lines @@
      *                    For compressed formats the level contains the compressed pixel data.
      *                    Otherwise, it contains width*height texels. If there is only one
      *                    element and it contains nullptr fPixels, texture data is
      *                    uninitialized.
      * @return    The texture object if successful, otherwise nullptr.
      */
     GrTexture* createTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
                              const SkTArray<GrMipLevel>& texels);
 
     /**
-     * Simplified createTexture() interface when there is no initial texel data
-     * to upload.
+     * This function is a shim which creates a SkTArGrMipLevell> of size 1.
+     * It then calls createTexture with that SkTArray.
+     *
+     * @param srcData  texel data to load texture. Begins with full-size
+     *                 palette data for paletted texture. For compressed
+     *                 formats it contains the compressed pixel data. Otherwise,
+     *                 it contains width*height texels. If nullptr texture data
+     *                 is uninitialized.
+     * @param rowBytes the number of bytes between consecutive rows. Zero
+     *                 means rows are tightly packed. This field is ignored
+     *                 for compressed pixel formats.
+     * @return    The texture object if successful, otherwise, nullptr.
      */
-    GrTexture* createTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted) {
-        return this->createTexture(desc, budgeted, SkTArray<GrMipLevel>());
-    }
-    
+    GrTexture* createTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
+                             const void* srcData, size_t rowBytes);
+
     /**
      * Implements GrTextureProvider::wrapBackendTexture
      */
     GrTexture* wrapBackendTexture(const GrBackendTextureDesc&, GrWrapOwnership);
 
     /**
      * Implements GrTextureProvider::wrapBackendRenderTarget
      */
     GrRenderTarget* wrapBackendRenderTarget(const GrBackendRenderTargetDesc&, GrWrapOwnership);
 
@@ skipping 485 matching lines @@
     ResetTimestamp                                                      fResetTimestamp;
     uint32_t                                                            fResetBits;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by Gpu.
     GrContext*                                                          fContext;
 
     friend class GrPathRendering;
     typedef SkRefCnt INHERITED;
 };
 
 #endif