Remove redundant codepath for webgl api blocking

content/browser/frame_host/render_frame_message_filter.cc

Index: content/browser/frame_host/render_frame_message_filter.cc
diff --git a/content/browser/frame_host/render_frame_message_filter.cc b/content/browser/frame_host/render_frame_message_filter.cc
index 803ce426f4fd58617fe21657165e315d13ca83b6..3d4165dd90900347af379d91a257cddc948f7359 100644
--- a/content/browser/frame_host/render_frame_message_filter.cc
+++ b/content/browser/frame_host/render_frame_message_filter.cc
@@ -302,7 +302,6 @@ bool RenderFrameMessageFilter::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_GetCookies, OnGetCookies)
     IPC_MESSAGE_HANDLER(FrameHostMsg_CookiesEnabled, OnCookiesEnabled)
     IPC_MESSAGE_HANDLER(FrameHostMsg_Are3DAPIsBlocked, OnAre3DAPIsBlocked)
-    IPC_MESSAGE_HANDLER(FrameHostMsg_DidLose3DContext, OnDidLose3DContext)
     IPC_MESSAGE_HANDLER_GENERIC(FrameHostMsg_RenderProcessGone,
                                 OnRenderProcessGone())
 #if defined(ENABLE_PLUGINS)
@@ -449,27 +448,6 @@ void RenderFrameMessageFilter::OnAre3DAPIsBlocked(int render_frame_id,
       top_origin_url, render_process_id_, render_frame_id, requester);
 }
 
-void RenderFrameMessageFilter::OnDidLose3DContext(
-    const GURL& top_origin_url,
-    ThreeDAPIType /* unused */,
-    int arb_robustness_status_code) {
-  GpuDataManagerImpl::DomainGuilt guilt;
-  switch (arb_robustness_status_code) {
-    case GL_GUILTY_CONTEXT_RESET_ARB:
-      guilt = GpuDataManagerImpl::DOMAIN_GUILT_KNOWN;
-      break;
-    case GL_UNKNOWN_CONTEXT_RESET_ARB:
-      guilt = GpuDataManagerImpl::DOMAIN_GUILT_UNKNOWN;
-      break;
-    default:
-      // Ignore lost contexts known to be innocent.
-      return;
-  }
-
-  GpuDataManagerImpl::GetInstance()->BlockDomainFrom3DAPIs(
-      top_origin_url, guilt);
-}
-
 void RenderFrameMessageFilter::OnRenderProcessGone() {
   // FrameHostMessage_RenderProcessGone is a synthetic IPC message used by
   // RenderProcessHostImpl to clean things up after a crash (it's injected