Revert "Workaround for Qualcomm renderbuffer resize bug"

gpu/command_buffer/service/renderbuffer_manager.cc

Index: gpu/command_buffer/service/renderbuffer_manager.cc
diff --git a/gpu/command_buffer/service/renderbuffer_manager.cc b/gpu/command_buffer/service/renderbuffer_manager.cc
index 2174fb9370eabc721fb557eaecd4b9cffd482c72..d734547073422f817b169d131e1dab7d194107b9 100644
--- a/gpu/command_buffer/service/renderbuffer_manager.cc
+++ b/gpu/command_buffer/service/renderbuffer_manager.cc
@@ -103,7 +103,6 @@ void Renderbuffer::SetInfoAndInvalidate(GLsizei samples,
   width_ = width;
   height_ = height;
   cleared_ = false;
-  allocated_ = true;
   for (auto& point : framebuffer_attachment_points_) {
     point.first->UnmarkAsComplete();
   }
@@ -128,7 +127,6 @@ Renderbuffer::Renderbuffer(RenderbufferManager* manager,
       client_id_(client_id),
       service_id_(service_id),
       cleared_(true),
-      allocated_(false),
       has_been_bound_(false),
       samples_(0),
       internal_format_(GL_RGBA4),
@@ -137,33 +135,6 @@ Renderbuffer::Renderbuffer(RenderbufferManager* manager,
   manager_->StartTracking(this);
 }
 
-bool Renderbuffer::RegenerateAndBindBackingObjectIfNeeded() {
-  if (!allocated_ || !has_been_bound_ || samples_ == 0) {
-    // Not needed - won't trigger bug (multisample_renderbuffer_resize_broken).
-    return false;
-  }
-
-  GLint original_fbo = 0;
-  glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &original_fbo);
-
-  glDeleteRenderbuffersEXT(1, &service_id_);
-  service_id_ = 0;
-  glGenRenderbuffersEXT(1, &service_id_);
-  glBindRenderbufferEXT(GL_RENDERBUFFER, service_id_);
-
-  // Attach new renderbuffer to all framebuffers
-  for (auto& point : framebuffer_attachment_points_) {
-    glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER, point.first->service_id());
-    glFramebufferRenderbufferEXT(GL_DRAW_FRAMEBUFFER, point.second,
-                                 GL_RENDERBUFFER, service_id_);
-  }
-
-  glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER, original_fbo);
-
-  allocated_ = false;
-  return true;
-}
-
 void Renderbuffer::AddFramebufferAttachmentPoint(Framebuffer* framebuffer,
                                                  GLenum attachment) {
   framebuffer_attachment_points_.insert(