aura: Allow in process ContextProvider to hold onscreen contexts.

content/browser/android/in_process/synchronous_compositor_impl.cc

Index: content/browser/android/in_process/synchronous_compositor_impl.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_impl.cc b/content/browser/android/in_process/synchronous_compositor_impl.cc
index 74048d86c84ed5ac477cfc8432c5f0e56d7bf02c..678f622875b9ceef5056a7b72a5057db68e7a795 100644
--- a/content/browser/android/in_process/synchronous_compositor_impl.cc
+++ b/content/browser/android/in_process/synchronous_compositor_impl.cc
@@ -70,7 +70,7 @@ class SynchronousCompositorFactoryImpl : public SynchronousCompositorFactory {
     if (!offscreen_context_for_main_thread_.get() ||
         offscreen_context_for_main_thread_->DestroyedOnMainThread()) {
       offscreen_context_for_main_thread_ =
-          webkit::gpu::ContextProviderInProcess::Create();
+          webkit::gpu::ContextProviderInProcess::CreateOffscreen();
       if (offscreen_context_for_main_thread_.get() &&
           !offscreen_context_for_main_thread_->BindToCurrentThread())
         offscreen_context_for_main_thread_ = NULL;
@@ -90,7 +90,7 @@ class SynchronousCompositorFactoryImpl : public SynchronousCompositorFactory {
     if (!offscreen_context_for_compositor_thread_.get() ||
         offscreen_context_for_compositor_thread_->DestroyedOnMainThread()) {
       offscreen_context_for_compositor_thread_ =
-          webkit::gpu::ContextProviderInProcess::Create();
+          webkit::gpu::ContextProviderInProcess::CreateOffscreen();
     }
     return offscreen_context_for_compositor_thread_;
   }