Removing ContentViewCore dependencies from few functions which acts as direct wrapper to WebContents

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
index c76ebc33a63ec2f08fce0714594af2de75fc46b3..ea43fff8bc9d3dae0b2aff66c8985d666260ffad 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
@@ -544,7 +544,7 @@ public class Tab implements NavigationClient {
 
     /** Stop the current navigation. */
     public void stopLoading() {
-        if (mContentViewCore != null) mContentViewCore.stopLoading();
+        if (mContentViewCore != null) mContentViewCore.getWebContents().stop();
     }
 
     /**
@@ -552,7 +552,7 @@ public class Tab implements NavigationClient {
      */
     public int getBackgroundColor() {
         if (mNativePage != null) return mNativePage.getBackgroundColor();
-        if (mContentViewCore != null) return mContentViewCore.getBackgroundColor();
+        if (mContentViewCore != null) return mContentViewCore.getWebContents().getBackgroundColor();
         return Color.WHITE;
     }
 
@@ -873,7 +873,7 @@ public class Tab implements NavigationClient {
      */
     @CalledByNative
     public String getUrl() {
-        return mContentViewCore != null ? mContentViewCore.getUrl() : "";
+        return mContentViewCore != null ? mContentViewCore.getWebContents().getUrl() : "";
     }
 
     /**
@@ -882,7 +882,7 @@ public class Tab implements NavigationClient {
     @CalledByNative
     public String getTitle() {
         if (mNativePage != null) return mNativePage.getTitle();
-        if (mContentViewCore != null) return mContentViewCore.getTitle();
+        if (mContentViewCore != null) return mContentViewCore.getWebContents().getTitle();
         return "";
     }
 
@@ -892,10 +892,11 @@ public class Tab implements NavigationClient {
      */
     public Bitmap getFavicon() {
         if (mContentViewCore != null) {
-            if (mFavicon == null || !mContentViewCore.getUrl().equals(mFaviconUrl)) {
+            if (mFavicon == null || !mContentViewCore.getWebContents().getUrl().
+                        equals(mFaviconUrl)) {
                 if (mNativeTabAndroid == 0) return null;
                 mFavicon = nativeGetFavicon(mNativeTabAndroid);
-                mFaviconUrl = mContentViewCore.getUrl();
+                mFaviconUrl = mContentViewCore.getWebContents().getUrl();
             }
         }
         return mFavicon;