Revert of Add support for ContentViewCore helpers on Tab

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 34c3beec4b81aaacd4c60ac9bbe2a9ba8726dd6f..9246385f8588d6205b54339e37e350166fdcc358 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -1353,17 +1353,6 @@
     }
 
     /**
-     * Sets whether or not this {@link ContentViewCore} will visibly display it's content. By
-     * default this is set to {@code true} so there is no need to call this to start showing content
-     * when initially creating a {@link ContentViewCore}.
-     * @param draws Whether or not this {@link ContentViewCore} should draw.
-     */
-    public void setDrawsContent(boolean draws) {
-        if (mNativeContentViewCore == 0) return;
-        nativeSetDrawsContent(mNativeContentViewCore, draws);
-    }
-
-    /**
      * To be called when the ContentView is shown.
      */
     public void onShow() {
@@ -3189,6 +3178,4 @@
             int x, int y, int w, int h);
 
     private native void nativeSetBackgroundOpaque(long nativeContentViewCoreImpl, boolean opaque);
-
-    private native void nativeSetDrawsContent(long nativeContentViewCoreImpl, boolean draws);
 }