Inlining support in optimizing.

Currently only inlines simple things that don't require an
environment, such as:
- Returning a constant.
- Returning a parameter.
- Returning an arithmetic operation.

Change-Id: Ie844950cb44f69e104774a3cf7a8dea66bc85661
diff --git a/compiler/optimizing/graph_visualizer.h b/compiler/optimizing/graph_visualizer.h
index 60d996b..b5baed9 100644
--- a/compiler/optimizing/graph_visualizer.h
+++ b/compiler/optimizing/graph_visualizer.h
@@ -47,16 +47,7 @@
                    HGraph* graph,
                    const char* string_filter,
                    const CodeGenerator& codegen,
-                   const DexCompilationUnit& cu);
-
-  /**
-   * Version of `HGraphVisualizer` for unit testing, that is when a
-   * `DexCompilationUnit` is not available.
-   */
-  HGraphVisualizer(std::ostream* output,
-                   HGraph* graph,
-                   const CodeGenerator& codegen,
-                   const char* name);
+                   const char* method_name);
 
   /**
    * If this visualizer is enabled, emit the compilation information