Fixes for the default texture....

gpu/command_buffer/service/texture_manager.h

Index: gpu/command_buffer/service/texture_manager.h
===================================================================
--- gpu/command_buffer/service/texture_manager.h	(revision 57082)
+++ gpu/command_buffer/service/texture_manager.h	(working copy)
@@ -217,6 +217,9 @@
                  GLsizei max_cube_map_texture_size);
   ~TextureManager();
 
+  // Init the texture manager.
+  bool Initialize();
+
   // Must call before destruction.
   void Destroy(bool have_context);
 
@@ -302,6 +305,11 @@
     return num_unrenderable_textures_ > 0;
   }
 
+  GLuint black_texture_id(GLenum target) const {
+    return target == GL_SAMPLER_2D ?  black_2d_texture_id_ :
+                                      black_cube_texture_id_;
+  }
+
  private:
   // Info for each texture in the system.
   // TODO(gman): Choose a faster container.
@@ -318,6 +326,12 @@
 
   int num_unrenderable_textures_;
 
+  // Black (0,0,0,1) textures for when non-renderable textures are used.
+  // NOTE: There is no corresponding TextureInfo for these textures.
+  // TextureInfos are only for textures the client side can access.
+  GLuint black_2d_texture_id_;
+  GLuint black_cube_texture_id_;
+
   // The default textures for each target (texture name = 0)
   TextureInfo::Ref default_texture_2d_;
   TextureInfo::Ref default_texture_cube_map_;