Added preliminary support for tile rasterization with Ganesh

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 3973fb8868c24a9a8d86b4eeea72e5f525dcec60..8d3d75c073cdacbdf1da2c6c531afa5002dc982d 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -832,8 +832,10 @@ ResourceProvider::ScopedWriteLockGL::ScopedWriteLockGL(
     ResourceProvider* resource_provider,
     ResourceProvider::ResourceId resource_id)
     : resource_provider_(resource_provider),
-      resource_id_(resource_id),
-      texture_id_(resource_provider->LockForWrite(resource_id)->gl_id) {
+      resource_id_(resource_id) {
+  const Resource* resource = resource_provider->LockForWrite(resource_id);
+  texture_id_ = resource->gl_id;
+  format_ = resource->format;
   DCHECK(texture_id_);
 }