Expose Blimp dependencies to the embedder

blimp/client/support/compositor/blimp_context_provider.cc

Index: blimp/client/support/compositor/blimp_context_provider.cc
diff --git a/blimp/client/feature/compositor/blimp_context_provider.cc b/blimp/client/support/compositor/blimp_context_provider.cc
similarity index 94%
rename from blimp/client/feature/compositor/blimp_context_provider.cc
rename to blimp/client/support/compositor/blimp_context_provider.cc
index 8c68d7b9b957b7a060788544f76756f3903aaa3b..373e4268500f280e56717e57703ab04178adf6a6 100644
--- a/blimp/client/feature/compositor/blimp_context_provider.cc
+++ b/blimp/client/support/compositor/blimp_context_provider.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "blimp/client/feature/compositor/blimp_context_provider.h"
+#include "blimp/client/support/compositor/blimp_context_provider.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ -124,11 +124,5 @@ void BlimpContextProvider::OnLostContext() {
     gr_context_->OnLostContext();
 }
 
-uint32_t BlimpContextProvider::GetCopyTextureInternalFormat() {
-  // The attributes used to create the context in the constructor specify
-  // an alpha channel.
-  return GL_RGBA;
-}
-
 }  // namespace client
 }  // namespace blimp