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

content/common/gpu/client/gl_helper_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdio.h>
 #include <cmath>
 #include <string>
 #include <vector>
 
 #include <GLES2/gl2.h>
@@ skipping 48 matching lines @@
     WebGraphicsContext3D::Attributes attributes;
     bool lose_context_when_out_of_memory = false;
     context_ =
         WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
             attributes, lose_context_when_out_of_memory);
     context_->InitializeOnCurrentThread();
     context_support_ = context_->GetContextSupport();
     helper_.reset(
         new content::GLHelper(context_->GetGLInterface(), context_support_));
     helper_scaling_.reset(new content::GLHelperScaling(
-        context_->GetGLInterface(), helper_.get()));
+        context_->GetGLInterface(), context_support_, helper_.get()));
   }
 
   void TearDown() override {
     helper_scaling_.reset(NULL);
     helper_.reset(NULL);
     context_.reset(NULL);
   }
 
   void StartTracing(const std::string& filter) {
     base::trace_event::TraceLog::GetInstance()->SetEnabled(
@@ skipping 1905 matching lines @@
   base::TestSuite* suite = new content::ContentTestSuite(argc, argv);
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool pool;
 #endif
 
   return base::LaunchUnitTestsSerially(
     argc,
     argv,
     base::Bind(&RunHelper, base::Unretained(suite)));
 }