gpu: Remove Echo and SwapCompletion GL interfacess

cc/test/test_context_provider.h

Index: cc/test/test_context_provider.h
diff --git a/cc/test/test_context_provider.h b/cc/test/test_context_provider.h
index 75c7663351681aa690cd8d0dc906589e4b188df4..dfdc7fd90a10bedc4349bb8b035e1eaa3d699f01 100644
--- a/cc/test/test_context_provider.h
+++ b/cc/test/test_context_provider.h
@@ -12,11 +12,12 @@
 #include "base/threading/thread_checker.h"
 #include "cc/output/context_provider.h"
 #include "cc/test/test_context_support.h"
+#include "cc/test/test_gles2_interface.h"
 #include "gpu/command_buffer/client/gles2_interface_stub.h"
+#include "ui/gfx/rect.h"
 
 namespace cc {
 class TestWebGraphicsContext3D;
-class TestGLES2Interface;
 
 class TestContextProvider : public ContextProvider {
  public:
@@ -54,6 +55,13 @@ class TestContextProvider : public ContextProvider {
 
   void SetMaxTransferBufferUsageBytes(size_t max_transfer_buffer_usage_bytes);
 
+  TestGLES2Interface::SwapType last_swap_type() const {
+    return context_gl_->last_swap_type();
+  }
+  gfx::Rect last_partial_swap_rect() const {
+    return context_gl_->last_partial_swap_rect();
+  }
+
  protected:
   explicit TestContextProvider(scoped_ptr<TestWebGraphicsContext3D> context);
   virtual ~TestContextProvider();