DCHECK if shader compilation fails that it's due to context loss.

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 75a204d1272cc4d40c7039d9436afab033df18f8..0d0da6fcac30867472a005c002c8c57da042ac98 100644
--- a/content/common/gpu/client/gl_helper_benchmark.cc
+++ b/content/common/gpu/client/gl_helper_benchmark.cc
@@ -67,7 +67,7 @@ class GLHelperTest : public testing::Test {
         new content::GLHelper(context_->GetGLInterface(),
                               context_->GetContextSupport()));
     helper_scaling_.reset(new content::GLHelperScaling(
-        context_->GetGLInterface(),
+        context_->GetGLInterface(), context_->GetContextSupport(),
         helper_.get()));
   }