Remove unused features for in-process GL contexts.

android_webview/browser/aw_render_thread_context_provider.cc

Index: android_webview/browser/aw_render_thread_context_provider.cc
diff --git a/android_webview/browser/aw_render_thread_context_provider.cc b/android_webview/browser/aw_render_thread_context_provider.cc
index fe115c6d0afb77b2b13d837f3054eb126fd012d1..c52a10aa6331a651c79e487273d507e3681e25cf 100644
--- a/android_webview/browser/aw_render_thread_context_provider.cc
+++ b/android_webview/browser/aw_render_thread_context_provider.cc
@@ -52,12 +52,9 @@ AwRenderThreadContextProvider::AwRenderThreadContextProvider(
   attributes.bind_generates_resource = false;
   context_.reset(gpu::GLInProcessContext::Create(
       service, surface, surface->IsOffscreen(), gfx::kNullAcceleratedWidget,
-      surface->GetSize(), nullptr /* share_context */,
-      false /* share_resources */, attributes, gfx::PreferDiscreteGpu,
-      gpu::GLInProcessContextSharedMemoryLimits(), nullptr, nullptr));
-
-  context_->SetContextLostCallback(base::Bind(
-      &AwRenderThreadContextProvider::OnLostContext, base::Unretained(this)));
+      surface->GetSize(), nullptr /* share_context */, attributes,
+      gfx::PreferDiscreteGpu, gpu::GLInProcessContextSharedMemoryLimits(),
+      nullptr, nullptr));
 
   capabilities_.gpu = context_->GetImplementation()->capabilities();
 }
@@ -116,11 +113,14 @@ void AwRenderThreadContextProvider::InvalidateGrContext(uint32_t state) {
 }
 
 void AwRenderThreadContextProvider::SetupLock() {
-  context_->SetLock(&context_lock_);
+  // This context provider is not used on multiple threads.
+  NOTREACHED();
 }
 
 base::Lock* AwRenderThreadContextProvider::GetLock() {
-  return &context_lock_;
+  // This context provider is not used on multiple threads.
+  NOTREACHED();
+  return nullptr;
 }
 
 void AwRenderThreadContextProvider::DeleteCachedResources() {
@@ -135,16 +135,8 @@ void AwRenderThreadContextProvider::DeleteCachedResources() {
 
 void AwRenderThreadContextProvider::SetLostContextCallback(
     const LostContextCallback& lost_context_callback) {
-  lost_context_callback_ = lost_context_callback;
-}
-
-void AwRenderThreadContextProvider::OnLostContext() {
-  DCHECK(main_thread_checker_.CalledOnValidThread());
-
-  if (!lost_context_callback_.is_null())
-    base::ResetAndReturn(&lost_context_callback_).Run();
-  if (gr_context_)
-    gr_context_->abandonContext();
+  // No support for lost context callbacks with in-process GL.
+  NOTREACHED();
 }
 
 }  // namespace android_webview