Turn on -Wall -Wextra on Mac, and fix all the warnings that crop up for /usr/bin/g++ and Clang 3.3.

src/utils/SkLayer.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkLayer.h"
 #include "SkCanvas.h"
 
@@ skipping 18 matching lines @@
     fMatrix.reset();
     fChildrenMatrix.reset();
     fFlags = 0;
 
 #ifdef DEBUG_TRACK_NEW_DELETE
     gLayerAllocCount += 1;
     SkDebugf("SkLayer new:    %d\n", gLayerAllocCount);
 #endif
 }
 
-SkLayer::SkLayer(const SkLayer& src) {
+SkLayer::SkLayer(const SkLayer& src) : INHERITED() {
     fParent = NULL;
     m_opacity = src.m_opacity;
     m_size = src.m_size;
     m_position = src.m_position;
     m_anchorPoint = src.m_anchorPoint;
 
     fMatrix = src.fMatrix;
     fChildrenMatrix = src.fChildrenMatrix;
     fFlags = src.fFlags;
 
@@ skipping 173 matching lines @@
 #endif
 
     int count = this->countChildren();
     if (count > 0) {
         canvas->concat(this->getChildrenMatrix());
         for (int i = 0; i < count; i++) {
             this->getChild(i)->draw(canvas, opacity);
         }
     }
 }