Fix glIsFoo() functions for non-bound objects in command buffer.

BUG=62617
TEST=LayoutTests/fast/canvas/webgl/is-object.html

Review URL: http://codereview.chromium.org/4723003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70517 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 1 deletions

diff --git a/gpu/command_buffer/service/renderbuffer_manager.h b/gpu/command_buffer/service/renderbuffer_manager.h
index db9ba816..16a1d80 100644
--- a/gpu/command_buffer/service/renderbuffer_manager.h
+++ b/gpu/command_buffer/service/renderbuffer_manager.h
@@ -26,6 +26,7 @@ class RenderbufferManager {
     explicit RenderbufferInfo(GLuint service_id)
         : service_id_(service_id),
           cleared_(false),
+          has_been_bound_(false),
           samples_(0),
           internal_format_(GL_RGBA4),
           width_(0),
@@ -69,10 +70,18 @@ class RenderbufferManager {
       cleared_ = false;
     }
 
-    bool IsDeleted() {
+    bool IsDeleted() const {
       return service_id_ == 0;
     }
 
+    void MarkAsValid() {
+      has_been_bound_ = true;
+    }
+
+    bool IsValid() const {
+      return has_been_bound_ && !IsDeleted();
+    }
+
    private:
     friend class RenderbufferManager;
     friend class base::RefCounted<RenderbufferInfo>;
@@ -89,6 +98,9 @@ class RenderbufferManager {
     // Whether this renderbuffer has been cleared
     bool cleared_;
 
+    // Whether this renderbuffer has ever been bound.
+    bool has_been_bound_;
+
     // Number of samples (for multi-sampled renderbuffers)
     GLsizei samples_;