Reland of Extend CopyTextureCHROMIUM to more ES 3.0 texture formats.

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index dd7d59c5474322fc89ea5fda5158825e06723381..fc1f21099d2daf0535e3e56b039fbb2b1d040f99 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -785,11 +785,14 @@ bool Texture::CanGenerateMipmaps(const FeatureInfo* feature_info) const {
     return false;
   }
 
-  if (!Texture::ColorRenderable(feature_info, base.internal_format,
-                                immutable_) ||
-      !Texture::TextureFilterable(feature_info, base.internal_format, base.type,
-                                  immutable_)) {
-    return false;
+  if (!feature_info->validators()->texture_unsized_internal_format.IsValid(
+          base.internal_format)) {
+    if (!Texture::ColorRenderable(feature_info, base.internal_format,
+                                  immutable_) ||
+        !Texture::TextureFilterable(feature_info, base.internal_format,
+                                    base.type, immutable_)) {
+      return false;
+    }
   }
 
   for (size_t ii = 0; ii < face_infos_.size(); ++ii) {
@@ -869,7 +872,8 @@ bool Texture::ColorRenderable(const FeatureInfo* feature_info,
                               bool immutable) {
   if (feature_info->validators()->texture_unsized_internal_format.IsValid(
       internal_format)) {
-    return true;
+    return internal_format == GL_RGBA || internal_format == GL_RGB ||
+           internal_format == GL_BGRA_EXT;
   }
 
   return SizedFormatAvailable(feature_info, immutable, internal_format) &&