Fix scrollbars missing after lost context

cc/layer_tree_host_unittest_context.cc

Index: cc/layer_tree_host_unittest_context.cc
diff --git a/cc/layer_tree_host_unittest_context.cc b/cc/layer_tree_host_unittest_context.cc
index cf9da18e157841235735795b9c6e071adb73c733..fe9416597b257d3e73e6a5deea665034d092f0db 100644
--- a/cc/layer_tree_host_unittest_context.cc
+++ b/cc/layer_tree_host_unittest_context.cc
@@ -30,6 +30,7 @@
 #include "cc/texture_layer.h"
 #include "cc/video_layer.h"
 #include "cc/video_layer_impl.h"
+#include "gpu/GLES2/gl2extchromium.h"
 #include "media/base/media.h"
 
 using media::VideoFrame;
@@ -53,7 +54,8 @@ class LayerTreeHostContextTest : public ThreadedTest {
   }
 
   void LoseContext() {
-    context3d_->loseContextCHROMIUM();
+    context3d_->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
+                                    GL_INNOCENT_CONTEXT_RESET_ARB);
     context3d_ = NULL;
   }
 
@@ -803,7 +805,8 @@ class LayerTreeHostContextTestFailsImmediately :
   virtual scoped_ptr<FakeWebGraphicsContext3D> CreateContext3d() OVERRIDE {
     scoped_ptr<FakeWebGraphicsContext3D> context =
         LayerTreeHostContextTest::CreateContext3d();
-    context->loseContextCHROMIUM();
+    context->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
+                                 GL_INNOCENT_CONTEXT_RESET_ARB);
     return context.Pass();
   }