Work around for nexus 6 TexSubImage issue

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 64f4cb3deca237649047db0ababf9954813ca01e..0039d9e6e012ffdb65a718cc5491e139f8d2909b 100755
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -324,7 +324,8 @@ bool GrContext::writeSurfacePixels(GrSurface* surface,
     {
         GrTexture* texture = NULL;
         if (!(kUnpremul_PixelOpsFlag & pixelOpsFlags) && (texture = surface->asTexture()) &&
-            fGpu->canWriteTexturePixels(texture, srcConfig)) {
+            fGpu->canWriteTexturePixels(texture, srcConfig) &&
+            !fCaps->useDrawInsteadOfPartialTextureWrite()) {

[bsalomon, 2015/06/18 16:53:52]

check that it is partial (note that the rect is known to be clipped to the
surface so you can just check w < s->w() || h < s->h())

 
             if (!(kDontFlush_PixelOpsFlag & pixelOpsFlags) &&
                 surface->surfacePriv().hasPendingIO()) {