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

src/gpu/GrGpu.cpp

Index: src/gpu/GrGpu.cpp
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index efd687d6a858923db669e28984f69c5e3e51ef49..4e0464a4ce6cb74f0e2c734b5fef8b1f3685e391 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -98,7 +98,7 @@
  * @param isRT Indicates if the texture can be a render target.
  */
 static bool check_texture_creation_params(const GrCaps& caps, const GrSurfaceDesc& desc,
-                                          bool* isRT, const SkTArray<GrMipLevel>& texels) {
+                                          bool* isRT) {
     if (!caps.isConfigTexturable(desc.fConfig)) {
         return false;
     }
@@ -124,12 +124,6 @@
             return false;
         }
     }
-
-    for (int i = 0; i < texels.count(); ++i) {
-        if (!texels[i].fPixels) {
-            return false;
-        }
-    }
     return true;
 }
 
@@ -139,7 +133,7 @@
 
     const GrCaps* caps = this->caps();
     bool isRT = false;
-    bool textureCreationParamsValid = check_texture_creation_params(*caps, desc, &isRT, texels);
+    bool textureCreationParamsValid = check_texture_creation_params(*caps, desc, &isRT);
     if (!textureCreationParamsValid) {
         return nullptr;
     }
@@ -183,6 +177,17 @@
         }
     }
     return tex;
+}
+
+GrTexture* GrGpu::createTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
+                                const void* srcData, size_t rowBytes) {
+    GrMipLevel level;
+    level.fPixels = srcData;
+    level.fRowBytes = rowBytes;
+    SkSTArray<1, GrMipLevel> levels;
+    levels.push_back(level);
+
+    return this->createTexture(desc, budgeted, levels);
 }
 
 GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
@@ -386,10 +391,15 @@
     if (!surface) {
         return false;
     }
+    bool validMipDataFound = false;
     for (int currentMipLevel = 0; currentMipLevel < texels.count(); currentMipLevel++) {
-        if (!texels[currentMipLevel].fPixels ) {
-            return false;
-        }
+        if (texels[currentMipLevel].fPixels != nullptr) {
+            validMipDataFound = true;
+            break;
+        }
+    }
+    if (!validMipDataFound) {
+        return false;
     }
 
     this->handleDirtyContext();