Move a bunch of headers from include/gpu to src/gpu. Delete some unused files.

Review URL: http://codereview.appspot.com/5304047/



git-svn-id: http://skia.googlecode.com/svn/trunk@2506 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrGLShaderVar.h b/src/gpu/GrGLShaderVar.h
index 5c50079..8eba714 100644
--- a/src/gpu/GrGLShaderVar.h
+++ b/src/gpu/GrGLShaderVar.h
@@ -10,6 +10,7 @@
 #define GrGLShaderVar_DEFINED
 
 #include "GrGLInterface.h"
+#include "GrStringBuilder.h"
 
 /**
  * Represents a variable in a shader