Remove ContextProvider::IsContextLost.

content/common/gpu/client/context_provider_command_buffer.cc

Index: content/common/gpu/client/context_provider_command_buffer.cc
diff --git a/content/common/gpu/client/context_provider_command_buffer.cc b/content/common/gpu/client/context_provider_command_buffer.cc
index 58e34b6431795a18818a84cafde51f9889987eba..cb827258a5fdf8c271bc0d3eb73874d9a5bc7fe4 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -137,7 +137,8 @@ class GrContext* ContextProviderCommandBuffer::GrContext() {
   gr_context_.reset(new GrContextForWebGraphicsContext3D(context3d_.get()));
 
   // If GlContext is already lost, also abandon the new GrContext.
-  if (gr_context_->get() && IsContextLost())
+  if (gr_context_->get() &&
+      ContextGL()->GetGraphicsResetStatusKHR() != GL_NO_ERROR)
     gr_context_->get()->abandonContext();
 
   return gr_context_->get();
@@ -168,18 +169,11 @@ ContextProviderCommandBuffer::ContextCapabilities() {
   return capabilities_;
 }
 
-bool ContextProviderCommandBuffer::IsContextLost() {
-  DCHECK(lost_context_callback_proxy_);  // Is bound to thread.
-  DCHECK(context_thread_checker_.CalledOnValidThread());
-
-  return context3d_->isContextLost();
-}
-
 void ContextProviderCommandBuffer::VerifyContexts() {
   DCHECK(lost_context_callback_proxy_);  // Is bound to thread.
   DCHECK(context_thread_checker_.CalledOnValidThread());
 
-  if (context3d_->isContextLost())
+  if (ContextGL()->GetGraphicsResetStatusKHR() != GL_NO_ERROR)
     OnLostContext();
 }