Revert 93066 - Execute all GL commands up to the put offset reported by a each flush.This means g...

gpu/command_buffer/common/constants.h

Index: gpu/command_buffer/common/constants.h
===================================================================
--- gpu/command_buffer/common/constants.h	(revision 93137)
+++ gpu/command_buffer/common/constants.h	(working copy)
@@ -21,12 +21,28 @@
     kUnknownCommand,
     kInvalidArguments,
     kLostContext,
-    kGenericError
+    kGenericError,
+
+    // This is not an error. It is returned by WaitLatch when it is blocked.
+    // When blocked, the context will not reschedule itself until another
+    // context executes a SetLatch command.
+    kWaiting,
+
+    // This is not an error either. It just hints the scheduler that it can exit
+    // its loop, update state, and schedule other command buffers.
+    kYield
   };
 
   // Return true if the given error code is an actual error.
   inline bool IsError(Error error) {
-    return error != kNoError;
+    switch (error) {
+      case kNoError:
+      case kWaiting:
+      case kYield:
+        return false;
+      default:
+        return true;
+    }
   }
 
   // Provides finer grained information about why the context was lost.