Resize synchronization for Linux.

app/gfx/gl/gl_context_linux.cc

Index: app/gfx/gl/gl_context_linux.cc
diff --git a/app/gfx/gl/gl_context_linux.cc b/app/gfx/gl/gl_context_linux.cc
index fd0b7b984b1d06bfc55b95602f4b655a63afeee8..bed9e18927adc449ec680907318fb955706f46bc 100644
--- a/app/gfx/gl/gl_context_linux.cc
+++ b/app/gfx/gl/gl_context_linux.cc
@@ -47,6 +47,7 @@ class ViewGLContext : public GLContext {
   virtual bool IsOffscreen();
   virtual bool SwapBuffers();
   virtual gfx::Size GetSize();
+  virtual void SetSize(gfx::Size size);
   virtual void* GetHandle();
   virtual void SetSwapInterval(int interval);
 
@@ -315,6 +316,14 @@ gfx::Size ViewGLContext::GetSize() {
   return gfx::Size(attributes.width, attributes.height);
 }
 
+void ViewGLContext::SetSize(gfx::Size size) {
+  // Need to flush the GL commands in flight so that the resize operation
+  // doesn't damage the backbuffer.
+  glFinish();
+
+  GLContext::SetSize(size);
+}
+
 void* ViewGLContext::GetHandle() {
   return context_;
 }