Port content::GLHelper over to GLES2Interface

content/common/gpu/client/gl_helper_benchmark.cc

Index: content/common/gpu/client/gl_helper_benchmark.cc
diff --git a/content/common/gpu/client/gl_helper_benchmark.cc b/content/common/gpu/client/gl_helper_benchmark.cc
index f9385fdd8225df6328f815823ce156f108e95d68..5e098f921e0d48c512b1e6437b92c7712987215b 100644
--- a/content/common/gpu/client/gl_helper_benchmark.cc
+++ b/content/common/gpu/client/gl_helper_benchmark.cc
@@ -67,9 +67,10 @@ class GLHelperTest : public testing::Test {
     context_->makeContextCurrent();
 
     helper_.reset(
-        new content::GLHelper(context_.get(), context_->GetContextSupport()));
+        new content::GLHelper(context_->GetGLInterface(),
+                              context_->GetContextSupport()));
     helper_scaling_.reset(new content::GLHelperScaling(
-        context_.get(),
+        context_->GetGLInterface(),
         helper_.get()));
   }