Fix for alpha textures on Nexus 6.

src/gpu/gl/GrGpuGL.cpp

Index: src/gpu/gl/GrGpuGL.cpp
diff --git a/src/gpu/gl/GrGpuGL.cpp b/src/gpu/gl/GrGpuGL.cpp
index 56eeb47efce197878a9d79dc5df28360e28df075..c899eba311f2b8485aaf3a290c0948534b35b1af 100644
--- a/src/gpu/gl/GrGpuGL.cpp
+++ b/src/gpu/gl/GrGpuGL.cpp
@@ -563,15 +563,11 @@ bool GrGpuGL::uploadTexData(const GrSurfaceDesc& desc,
     // size of the internal format whenever possible and so only use a sized internal format when
     // using texture storage.
     bool useSizedFormat = useTexStorage;
-    // At least some versions of the ES3 drivers for NVIDIA and IMG won't accept GL_RED in
+    // Many versions of the ES3 drivers on various platforms will not accept GL_RED in
     // glTexImage2D for the internal format but will accept GL_R8.
-    if (kNVIDIA_GrGLVendor == this->glContext().vendor() ||
-        kImagination_GrGLVendor == this->glContext().vendor() ||
-        this->glContext().isMesa()) {
-        if (kGLES_GrGLStandard == this->glStandard() && this->glVersion() >= GR_GL_VER(3, 0) &&
-            kAlpha_8_GrPixelConfig == dataConfig) {
-           useSizedFormat = true;
-        }
+    if (kGLES_GrGLStandard == this->glStandard() && this->glVersion() >= GR_GL_VER(3, 0) &&
+        kAlpha_8_GrPixelConfig == dataConfig) {
+        useSizedFormat = true;
     }
     if (!this->configToGLFormats(dataConfig, useSizedFormat, &internalFormat,
                                  &externalFormat, &externalType)) {