Resize synchronization for Linux.

app/gfx/gl/gl_context.h

Index: app/gfx/gl/gl_context.h
diff --git a/app/gfx/gl/gl_context.h b/app/gfx/gl/gl_context.h
index 865af76595da34d8ab6d70e7ecfd6222e39092e4..55371a2fcde5be2ee44a93d4426cd9e24ff6ae9d 100644
--- a/app/gfx/gl/gl_context.h
+++ b/app/gfx/gl/gl_context.h
@@ -8,6 +8,9 @@
 
 #include <string>
 
+#include "base/callback.h"
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
 #include "build/build_config.h"
 #include "gfx/native_widget_types.h"
 #include "gfx/size.h"
@@ -36,10 +39,11 @@ class GLContext {
   // contexts.
   virtual bool SwapBuffers() = 0;
 
-  // Set the size of the back buffer.
-  // FIXME(backer): Currently a NOP. Once we have an implementation for each
-  //     backend we can switch it to pure virtual.
-  virtual void SetSize(gfx::Size) {}
+  // Set the size of the back buffer. Calls the callback.

[nduca, 2010/11/23 16:59:49]

Is there a way to put this callback on the GL-specific implementation? Its a bit
awkward to have this on the global GL context.

[jonathan.backer, 2010/11/23 21:00:19]

Done.

+  virtual void SetSize(gfx::Size size);
+
+  // Sometimes used to delegate resizing the back buffer.
+  virtual void RegisterSetSizeCallback(Callback1<gfx::Size>::Type* callback);
 
   // Get the size of the back buffer.
   virtual gfx::Size GetSize() = 0;
@@ -75,6 +79,8 @@ class GLContext {
   bool InitializeCommon();
 
  private:
+  scoped_ptr<Callback1<gfx::Size>::Type> set_size_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(GLContext);
 };