diff --git a/core/Makefile b/core/Makefile
index e0aa9c3..d43cb78 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -198,6 +198,7 @@
 			BUILD_ID="$(BUILD_ID)" \
 			BUILD_DISPLAY_ID="$(BUILD_DISPLAY_ID)" \
 			BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
+			BOARD_BUILD_SYSTEM_ROOT_IMAGE="$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)" \
 			PLATFORM_VERSION="$(PLATFORM_VERSION)" \
 			PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
 			PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
@@ -845,7 +846,7 @@
   $(hide) mkdir -p $(TARGET_RECOVERY_OUT)
   $(hide) mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/etc $(TARGET_RECOVERY_ROOT_OUT)/tmp
   @echo Copying baseline ramdisk...
-  $(hide) rsync -a $(TARGET_ROOT_OUT) $(TARGET_RECOVERY_OUT) # "cp -Rf" fails to overwrite broken symlinks on Mac.
+  $(hide) rsync -a --exclude=etc $(TARGET_ROOT_OUT) $(TARGET_RECOVERY_OUT) # "cp -Rf" fails to overwrite broken symlinks on Mac.
   @echo Modifying ramdisk contents...
   $(hide) rm -f $(TARGET_RECOVERY_ROOT_OUT)/init*.rc
   $(hide) cp -f $(recovery_initrc) $(TARGET_RECOVERY_ROOT_OUT)/
@@ -863,6 +864,10 @@
   $(hide) cp $(RECOVERY_INSTALL_OTA_KEYS) $(TARGET_RECOVERY_ROOT_OUT)/res/keys
   $(hide) cat $(INSTALLED_DEFAULT_PROP_TARGET) $(recovery_build_prop) \
           > $(TARGET_RECOVERY_ROOT_OUT)/default.prop
+  $(if $(filter true,$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)), \
+    $(hide) mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/system_root; \
+            rm -rf $(TARGET_RECOVERY_ROOT_OUT)/system; \
+            ln -sf /system_root/system $(TARGET_RECOVERY_ROOT_OUT)/system) # Mount the system_root_image to /system_root and symlink /system.
   $(hide) $(MKBOOTFS) $(TARGET_RECOVERY_ROOT_OUT) | $(MINIGZIP) > $(recovery_ramdisk)
   $(if $(filter true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)), \
     $(hide) $(MKBOOTIMG) $(INTERNAL_RECOVERYIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1).unsigned, \
diff --git a/envsetup.sh b/envsetup.sh
index 62802df..3c29e88 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -198,6 +198,7 @@
     fi
 
     export PATH=$ANDROID_BUILD_PATHS$PATH
+    export PYTHONPATH=$T/system/core:$PYTHONPATH
 
     unset ANDROID_JAVA_TOOLCHAIN
     unset ANDROID_PRE_BUILD_PATHS
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index dcd9ab5..1fb203a 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -17,6 +17,9 @@
 echo "ro.build.host=`hostname`"
 echo "ro.build.tags=$BUILD_VERSION_TAGS"
 echo "ro.build.flavor=$TARGET_BUILD_FLAVOR"
+if [ -n "$BOARD_BUILD_SYSTEM_ROOT_IMAGE" ] ; then
+  echo "ro.build.system_root_image=$BOARD_BUILD_SYSTEM_ROOT_IMAGE"
+fi
 echo "ro.product.model=$PRODUCT_MODEL"
 echo "ro.product.brand=$PRODUCT_BRAND"
 echo "ro.product.name=$PRODUCT_NAME"
diff --git a/tools/droiddoc/templates-sac/assets/css/default.css b/tools/droiddoc/templates-sac/assets/css/default.css
index c1a0c19..2572aae 100644
--- a/tools/droiddoc/templates-sac/assets/css/default.css
+++ b/tools/droiddoc/templates-sac/assets/css/default.css
@@ -420,8 +420,12 @@
   border-top: 1px solid #ccc;
   margin-top: 10px;
   padding-top:10px;
-  height: 30px; }
+  height: 30px;
+}
 
+.content-footer-test {
+  border-top: 1px solid #ccc;
+}
 .content-footer .col-9 {
   margin-left:0;
 }
@@ -4457,6 +4461,11 @@
   float:right;
 }
 
+.feedback {
+  float:right !important;
+  margin: 0 0 0 10px;
+  font-size: 14px;
+}
 
 
 /************* HOME/LANDING PAGE *****************/
diff --git a/tools/droiddoc/templates-sac/docpage.cs b/tools/droiddoc/templates-sac/docpage.cs
index 3e5c24f..6b16a57 100644
--- a/tools/droiddoc/templates-sac/docpage.cs
+++ b/tools/droiddoc/templates-sac/docpage.cs
@@ -116,18 +116,13 @@
     <div class="jd-descr" itemprop="articleBody">
     <?cs call:tag_list(root.descr) ?>
     </div>
-      
-      <div class="content-footer <?cs 
-                    if:fullpage ?>wrap<?cs
-                    else ?>layout-content-row<?cs /if ?>" 
+
+      <div class="content-footer-test"
                     itemscope itemtype="http://schema.org/SiteNavigationElement">
         <div class="layout-content-col <?cs 
                     if:fullpage ?>col-16<?cs 
                     elif:training||guide ?>col-8<?cs 
                     else ?>col-9<?cs /if ?>" style="padding-top:4px">
-          <?cs if:!page.noplus ?><?cs if:fullpage ?><style>#___plusone_0 {float:right !important;}</style><?cs /if ?>
-            <div class="g-plusone" data-size="medium"></div>
-          <?cs /if ?>
         </div>
         <?cs if:!fullscreen ?>
         <div class="paging-links layout-content-col col-4">
@@ -138,7 +133,7 @@
                 ru-lang="Предыдущий"
                 ko-lang="이전"
                 ja-lang="前へ"
-                es-lang="Anterior"               
+                es-lang="Anterior"
                 >Previous</a>
             <a href="#" class="next-page-link hide"
                 zh-TW-lang="下一堂課"
diff --git a/tools/droiddoc/templates-sac/footer.cs b/tools/droiddoc/templates-sac/footer.cs
index 6979ca0..ea22605 100644
--- a/tools/droiddoc/templates-sac/footer.cs
+++ b/tools/droiddoc/templates-sac/footer.cs
@@ -1,4 +1,9 @@
 <div id="footer" class="wrap" <?cs if:fullpage ?>style="width:940px"<?cs /if ?>>
+  <style>.feedback { float: right !Important }</style>
+  <div class="feedback">
+    <a href="#" class="button" onclick=" try {
+      userfeedback.api.startFeedback({'productId':'715571','authuser':'1'});return false;}catch(e){}">Send Feedback</a>
+  </div>
   <div id="copyright">
     <?cs call:custom_cc_copyright() ?>
   </div>
diff --git a/tools/droiddoc/templates-sac/head_tag.cs b/tools/droiddoc/templates-sac/head_tag.cs
index 5cee68c..b672b25 100644
--- a/tools/droiddoc/templates-sac/head_tag.cs
+++ b/tools/droiddoc/templates-sac/head_tag.cs
@@ -46,6 +46,8 @@
 <script src="<?cs var:toroot ?>navtree_data.js" async type="text/javascript"></script>
 <?cs /if ?>
 
+<script type="text/javascript" src="//www.gstatic.com/feedback/api.js"></script>
+
 <script type="text/javascript">
   var _gaq = _gaq || [];
   _gaq.push(['_setAccount', 'UA-45455297-1']);
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 5fcdbe4..9112108 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -202,7 +202,7 @@
   makeint("boot_size")
   makeint("fstab_version")
 
-  d["fstab"] = LoadRecoveryFSTab(read_helper, d["fstab_version"])
+  d["fstab"] = LoadRecoveryFSTab(read_helper, d["fstab_version"], d.get("system_root_image", False))
   d["build.prop"] = LoadBuildProp(read_helper)
   return d
 
@@ -225,7 +225,7 @@
       d[name] = value
   return d
 
-def LoadRecoveryFSTab(read_helper, fstab_version):
+def LoadRecoveryFSTab(read_helper, fstab_version, system_root_image=False):
   class Partition(object):
     def __init__(self, mount_point, fs_type, device, length, device2, context):
       self.mount_point = mount_point
@@ -317,6 +317,11 @@
   else:
     raise ValueError("Unknown fstab_version: \"%d\"" % (fstab_version,))
 
+  # / is used for the system mount point when the root directory is included in
+  # system. Other areas assume system is always at "/system" so point /system at /
+  if system_root_image:
+    assert not d.has_key("/system") and d.has_key("/")
+    d["/system"] = d["/"]
   return d