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

content/common/gpu/client/gl_helper.cc

 // Copyright (c) 2012 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 "content/common/gpu/client/gl_helper.h"
 
 #include <queue>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 888 matching lines @@
 void GLHelper::InitCopyTextToImpl() {
   // Lazily initialize |copy_texture_to_impl_|
   if (!copy_texture_to_impl_)
     copy_texture_to_impl_.reset(
         new CopyTextureToImpl(gl_, context_support_, this));
 }
 
 void GLHelper::InitScalerImpl() {
   // Lazily initialize |scaler_impl_|
   if (!scaler_impl_)
-    scaler_impl_.reset(new GLHelperScaling(gl_, this));
+    scaler_impl_.reset(new GLHelperScaling(gl_, context_support_, this));
 }
 
 GLint GLHelper::MaxDrawBuffers() {
   InitCopyTextToImpl();
   return copy_texture_to_impl_->MaxDrawBuffers();
 }
 
 void GLHelper::CopySubBufferDamage(GLuint texture,
                                    GLuint previous_texture,
                                    const SkRegion& new_damage,
@@ skipping 456 matching lines @@
   InitCopyTextToImpl();
   return copy_texture_to_impl_->CreateReadbackPipelineYUV(quality,
                                                           src_size,
                                                           src_subrect,
                                                           dst_size,
                                                           flip_vertically,
                                                           use_mrt);
 }
 
 }  // namespace content