gpu: Remove Echo and SwapCompletion GL interfacess

cc/test/test_gles2_interface.h

Index: cc/test/test_gles2_interface.h
diff --git a/cc/test/test_gles2_interface.h b/cc/test/test_gles2_interface.h
index 68495f4a46f60351087e2e19dc09fd4d57a5d129..2ee6c5cdd8fd22458bad8d9d0b48441806a7720b 100644
--- a/cc/test/test_gles2_interface.h
+++ b/cc/test/test_gles2_interface.h
@@ -6,6 +6,7 @@
 #define CC_TEST_TEST_GLES2_INTERFACE_H_
 
 #include "gpu/command_buffer/client/gles2_interface_stub.h"
+#include "ui/gfx/rect.h"
 
 namespace cc {
 class TestWebGraphicsContext3D;
@@ -189,8 +190,25 @@ class TestGLES2Interface : public gpu::gles2::GLES2InterfaceStub {
                               float device_scale) OVERRIDE;
   virtual void LoseContextCHROMIUM(GLenum current, GLenum other) OVERRIDE;
 
+  virtual void SwapBuffers() OVERRIDE;

[jamesr, 2014/10/01 00:06:28]

sucks to encode these on GLES2Interface.  I don't think they belong here -
https://www.khronos.org/opengles/sdk/docs/man/ has no 'SwapBuffers' or
'PostSubBuffer'.  I think of GpuControl as being the place to put things that
aren't GLES2 entry points but need ordering or other guarantees and
GLES2Interface as being just true GL entry points.  but maybe that distinction
isn't useful

[no sievers, 2014/10/01 00:12:52]

In this patch I'm just removing a layer of indirection (GpuControl::Swap()
calling GLES2Impl::Swap). It might have to stay in GLES2Impl at least since it
inserts a token into the cmdbuffer. (Not sure if it is needed in
GLES2Interface.)

+  virtual void PostSubBufferCHROMIUM(GLint x,
+                                     GLint y,
+                                     GLint width,
+                                     GLint height) OVERRIDE;
+
+  enum SwapType {
+    NO_SWAP,
+    SWAP,
+    PARTIAL_SWAP
+  };
+  SwapType last_swap_type() const { return last_swap_type_; }
+  gfx::Rect last_partial_swap_rect() const { return last_partial_swap_rect_; }
+
  private:
   TestWebGraphicsContext3D* test_context_;
+
+  SwapType last_swap_type_;
+  gfx::Rect last_partial_swap_rect_;
 };
 
 }  // namespace cc