Revert of Handle long press in PDF documents.

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index 993f7b3aeaca9aa982d2baa2cdb2bfd256f0ed0a..da5793d9b0dd2e09d771c67cb3c493645f3625ad 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -245,8 +245,6 @@
   document.addEventListener('keydown', this.handleKeyEvent_.bind(this));
   document.addEventListener('mousemove', this.handleMouseEvent_.bind(this));
   document.addEventListener('mouseout', this.handleMouseEvent_.bind(this));
-  document.addEventListener('contextmenu',
-      this.handleContextMenuEvent_.bind(this));
 
   var tabId = this.browserApi_.getStreamInfo().tabId;
   this.navigator_ = new Navigator(
@@ -412,17 +410,6 @@
       this.toolbarManager_.hideToolbarsForMouseOut();
   },
 
-  handleContextMenuEvent_: function(e) {
-    // Stop Chrome from popping up the context menu on long press. We need to
-    // make sure the start event did not have 2 touches because we don't want
-    // to block two finger tap opening the context menu. We check for
-    // firesTouchEvents in order to not block the context menu on right click.
-    if (e.sourceCapabilities.firesTouchEvents &&
-        !this.gestureDetector_.wasTwoFingerTouch()) {
-      e.preventDefault();
-    }
-  },
-
   /**
    * @private
    * Rotate the plugin clockwise.