Revert of skia: Add support for CHROMIUM_image backed textures.

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index ce2f95ef30e371ed9367426c9884791214fe63a8..ec93bbfe21492b0b48226065398814eb14ef7a8b 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -159,18 +159,6 @@
     // compatible stencil format, or negative if there is no compatible stencil format.
     int getCompatibleStencilIndex(GrPixelConfig config);
 
-    // If |desc.fTextureStorageAllocator| exists, use that to create the
-    // texture. Otherwise, create the texture directly.
-    // Returns whether the texture is successfully created. On success, the
-    // result is stored in |info|.
-    // The texture is populated with |srcData|, if it exists.
-    // The texture parameters are cached in |initialTexParams|.
-    bool createTextureImpl(const GrSurfaceDesc& desc, GrGLTextureInfo* info,
-                           bool renderTarget, const void* srcData,
-                           GrGLTexture::TexParams* initialTexParams, size_t rowBytes);
-    bool createTextureExternalAllocatorImpl(const GrSurfaceDesc& desc, GrGLTextureInfo* info,
-                                            const void* srcData, size_t rowBytes);
-
     void onClear(GrRenderTarget*, const SkIRect& rect, GrColor color) override;
 
     void onClearStencilClip(GrRenderTarget*, const SkIRect& rect, bool insideClip) override;