Make inner class InvalidDescriber static in
ContentType

This avoids the pointer to the outer class and save a tiny bit of
memory. Done via JDT cleanup actions

Change-Id: I1f9f2c83e53c533b6b04dd34841d8efb39e90568
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>

bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java

diff --git a/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java b/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java
index 7759cf3..23192d1 100644
--- a/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java
+++ b/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java
@@ -26,7 +26,7 @@
 public final class ContentType implements IContentType, IContentTypeInfo {
 
 	/* A placeholder for missing/invalid binary/text describers. */
-	private class InvalidDescriber implements IContentDescriber, ITextContentDescriber {
+	private static class InvalidDescriber implements IContentDescriber, ITextContentDescriber {
 		@Override
 		public int describe(InputStream contents, IContentDescription description) {
 			return INVALID;