Revert of [Android] Enhanced bookmark default mobile folder experiment.

Revert of [Android] Enhanced bookmark default mobile folder experiment. (patchset #1 id:1 of https://codereview.chromium.org/1425293009/ )

Reason for revert:
This CL had a bug that when experiment is turned on, it always forwards all bookmarks to mobile folder.

Original issue's description:
> [Android] Enhanced bookmark default mobile folder experiment.
>
> BUG=552508
>
> Committed: https://crrev.com/964c0baff2687c52a43935fafca4ee07790b047e
> Cr-Commit-Position: refs/heads/master@{#358441}

TBR=ianwen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=552508
Committed: https://crrev.com/1a111a94db99f39773af78c4c3ad2b60ea21eeec
Cr-Commit-Position: refs/heads/master@{#359599}

[Kibeom Kim (inactive), 2015-11-13 19:03:07]

Created Revert of [Android] Enhanced bookmark default mobile folder experiment.

[commit-bot: I haz the power, 2015-11-13 19:06:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1445553003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1445553003/1

[commit-bot: I haz the power, 2015-11-13 19:09:15]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-11-13 19:09:16]

Failed to apply patch for
chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java:
While running git apply --index -3 -p1;
  error: patch failed:
chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java:31
  Falling back to three-way merge...
  Applied patch to
'chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java'
with conflicts.
  U
chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java

Patch:      
chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
Index:
chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
diff --git
a/chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
b/chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
index
bb36d37553390673fa0f0d4a80c922b87fb4e1d6..f8e161139336c1c0a1081fd17bf22560244c5967
100644
---
a/chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
+++
b/chrome/android/java/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkManager.java
@@ -31,7 +31,6 @@
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.snackbar.SnackbarManager.SnackbarManageable;
 import org.chromium.components.bookmarks.BookmarkId;
-import org.chromium.components.variations.VariationsAssociatedData;
 
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
@@ -50,8 +49,6 @@
 public class EnhancedBookmarkManager implements EnhancedBookmarkDelegate {
     private static final String PREF_LAST_USED_URL =
"enhanced_bookmark_last_used_url";
     private static final int FAVICON_MAX_CACHE_SIZE_BYTES = 10 * 1024 * 1024;
// 10MB
-    private static final String FIELD_TRIAL_NAME = "EnhancedBookmarks";
-    private static final String DEFAULT_FOLDER = "default_folder";
 
     private Activity mActivity;
     private ViewGroup mMainView;
@@ -545,14 +542,7 @@
             state.mUrl = url;
 
             if (url.equals(UrlConstants.BOOKMARKS_URL)) {
-                if (VariationsAssociatedData
-                        .getVariationParamValue(FIELD_TRIAL_NAME,
DEFAULT_FOLDER)
-                        .equals("mobile")) {
-                    state.mFolder = bookmarkModel.getMobileFolderId();
-                    state.mState = STATE_FOLDER;
-                } else {
-                    state.mState = STATE_ALL_BOOKMARKS;
-                }
+                state.mState = STATE_ALL_BOOKMARKS;
             } else if (url.startsWith(UrlConstants.BOOKMARKS_FOLDER_URL)) {
                 String suffix = decodeSuffix(url,
UrlConstants.BOOKMARKS_FOLDER_URL);
                 if (!suffix.isEmpty()) {

[commit-bot: I haz the power, 2015-11-13 19:11:01]

The CQ bit was unchecked by commit-bot@chromium.org

[Kibeom Kim (inactive), 2015-11-13 19:24:52]

The CQ bit was checked by kkimlabs@chromium.org

[commit-bot: I haz the power, 2015-11-13 19:26:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1445553003/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1445553003/40001

[commit-bot: I haz the power, 2015-11-13 19:28:48]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2015-11-13 19:29:30]

Patchset 2 (id:??) landed as
https://crrev.com/1a111a94db99f39773af78c4c3ad2b60ea21eeec
Cr-Commit-Position: refs/heads/master@{#359599}