Expose the page URL to the java context menu params.

BUG=481801

Review URL: https://codereview.chromium.org/1113723002

Cr-Commit-Position: refs/heads/master@{#327422}

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuParams.java

@@ -39,6 +39,7 @@ public class ContextMenuParams {
         }
     }
 
+    private final String mPageUrl;
     private final String mLinkUrl;
     private final String mLinkText;
     private final String mUnfilteredLinkUrl;
@@ -87,6 +88,13 @@ public class ContextMenuParams {
         return mCustomMenuItems.get(index).action;
     }
 
+    /**
+     * @return The URL associated with the main frame of the page that triggered the context menu.
+     */
+    public String getPageUrl() {
+        return mPageUrl;
+    }
+
     /**
      * @return The link URL, if any.
      */
@@ -157,9 +165,10 @@ public class ContextMenuParams {
         return mIsVideo;
     }
 
-    private ContextMenuParams(int mediaType, String linkUrl, String linkText,
+    private ContextMenuParams(int mediaType, String pageUrl, String linkUrl, String linkText,
             String unfilteredLinkUrl, String srcUrl, String selectionText, boolean isEditable,
             Referrer referrer) {
+        mPageUrl = pageUrl;
         mLinkUrl = linkUrl;
         mLinkText = linkText;
         mUnfilteredLinkUrl = unfilteredLinkUrl;
@@ -174,13 +183,13 @@ public class ContextMenuParams {
     }
 
     @CalledByNative
-    private static ContextMenuParams create(int mediaType, String linkUrl, String linkText,
-            String unfilteredLinkUrl, String srcUrl, String selectionText, boolean isEditable,
-            String sanitizedReferrer, int referrerPolicy) {
+    private static ContextMenuParams create(int mediaType, String pageUrl, String linkUrl,
+            String linkText, String unfilteredLinkUrl, String srcUrl, String selectionText,
+            boolean isEditable, String sanitizedReferrer, int referrerPolicy) {
         Referrer referrer = TextUtils.isEmpty(sanitizedReferrer)
                 ? null : new Referrer(sanitizedReferrer, referrerPolicy);
-        return new ContextMenuParams(mediaType, linkUrl, linkText, unfilteredLinkUrl, srcUrl,
-                selectionText, isEditable, referrer);
+        return new ContextMenuParams(mediaType, pageUrl, linkUrl, linkText, unfilteredLinkUrl,
+                srcUrl, selectionText, isEditable, referrer);
     }
 
     @CalledByNative

chrome/browser/ui/android/context_menu_helper.cc

@@ -80,6 +80,7 @@ ContextMenuHelper::CreateJavaContextMenuParams(
       ContextMenuParamsAndroid::Java_ContextMenuParams_create(
           env,
           params.media_type,
+          ConvertUTF8ToJavaString(env, params.page_url.spec()).obj(),
           ConvertUTF8ToJavaString(env, params.link_url.spec()).obj(),
           ConvertUTF16ToJavaString(env, params.link_text).obj(),
           ConvertUTF8ToJavaString(env, params.unfiltered_link_url.spec()).obj(),