Add GL_CHROMIUM_get_error_query

gpu/command_buffer/client/query_tracker.h

Index: gpu/command_buffer/client/query_tracker.h
diff --git a/gpu/command_buffer/client/query_tracker.h b/gpu/command_buffer/client/query_tracker.h
index 97464978b13e94e88f0310cecb2561b109304c58..adaba82dd90dec8415c0c8922896e2f7a421ec87 100644
--- a/gpu/command_buffer/client/query_tracker.h
+++ b/gpu/command_buffer/client/query_tracker.h
@@ -8,9 +8,9 @@
 #include <GLES2/gl2.h>
 
 #include <queue>
-#include "../../gpu_export.h"
 #include "../client/hash_tables.h"
 #include "../common/gles2_cmd_format.h"
+#include "gles2_impl_export.h"
 
 namespace gpu {
 
@@ -19,8 +19,10 @@ class MappedMemoryManager;
 
 namespace gles2 {
 
+class GLES2Implementation;
+
 // Manages buckets of QuerySync instances in mapped memory.
-class GPU_EXPORT QuerySyncManager {
+class GLES2_IMPL_EXPORT QuerySyncManager {
  public:
   static const size_t kSyncsPerBucket = 4096;
 
@@ -57,9 +59,9 @@ class GPU_EXPORT QuerySyncManager {
 };
 
 // Tracks queries for client side of command buffer.
-class GPU_EXPORT QueryTracker {
+class GLES2_IMPL_EXPORT QueryTracker {
  public:
-  class GPU_EXPORT Query {
+  class GLES2_IMPL_EXPORT Query {
    public:
     enum State {
       kUninitialized,  // never used
@@ -126,6 +128,9 @@ class GPU_EXPORT QueryTracker {
 
     uint32 GetResult() const;
 
+    void Begin(GLES2Implementation* gl);
+    void End(GLES2Implementation* gl);
+
    private:
     friend class QueryTracker;
     friend class QueryTrackerTest;