Adjust Query code to handle context lost

BUG=140116


Review URL: https://chromiumcodereview.appspot.com/10837105

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149978 0039d316-1c4b-4281-b951-d872f2087c98

gpu/command_buffer/client/gles2_implementation.cc

@@ -3059,7 +3059,7 @@ void GLES2Implementation::DeleteQueriesEXTHelper(
         MustBeContextLost();
       }
     }
-    query_tracker_->RemoveQuery(queries[ii]);
+    query_tracker_->RemoveQuery(queries[ii], context_lost_);
   }
   helper_->DeleteQueriesEXTImmediate(n, queries);
 }

gpu/command_buffer/client/query_tracker.cc

@@ -151,11 +151,12 @@ QueryTracker::Query* QueryTracker::GetQuery(
   return it != queries_.end() ? it->second : NULL;
 }
 
-void QueryTracker::RemoveQuery(GLuint client_id) {
+void QueryTracker::RemoveQuery(GLuint client_id, bool context_lost) {
+  (void)context_lost;  // stop unused warning
   QueryMap::iterator it = queries_.find(client_id);
   if (it != queries_.end()) {
     Query* query = it->second;
-    GPU_DCHECK(!query->Pending());
+    GPU_DCHECK(context_lost || !query->Pending());
     query_sync_manager_.Free(query->info_);
     queries_.erase(it);
     delete query;

gpu/command_buffer/client/query_tracker.h

@@ -150,7 +150,7 @@ class GLES2_IMPL_EXPORT QueryTracker {
 
   Query* CreateQuery(GLuint id, GLenum target);
   Query* GetQuery(GLuint id);
-  void RemoveQuery(GLuint id);
+  void RemoveQuery(GLuint id, bool context_lost);
 
  private:
   typedef gpu::hash_map<GLuint, Query*> QueryMap;

gpu/command_buffer/client/query_tracker_unittest.cc

@@ -115,7 +115,7 @@ TEST_F(QueryTrackerTest, Basic) {
   // Check we get nothing for a non-existent query.
   EXPECT_TRUE(query_tracker_->GetQuery(kId2) == NULL);
   // Check we can delete the query.
-  query_tracker_->RemoveQuery(kId1);
+  query_tracker_->RemoveQuery(kId1, false);
   // Check we get nothing for a non-existent query.
   EXPECT_TRUE(query_tracker_->GetQuery(kId1) == NULL);
 }