Using Backspace to Go Back is just ridiculous.

chrome.patch

Index: chrome/browser/global_keyboard_shortcuts_mac.mm
===================================================================
--- chrome/browser/global_keyboard_shortcuts_mac.mm  (revision 184327)
+++ chrome/browser/global_keyboard_shortcuts_mac.mm	(working copy)
@@ -79,8 +79,10 @@
     //---   -----  -----  ------
     {true,  false, false, false, kVK_LeftArrow,    0,   IDC_BACK},
     {true,  false, false, false, kVK_RightArrow,   0,   IDC_FORWARD},
+#if USE_IDIOTIC_SHORTCUT_KEYS
     {false, false, false, false, kVK_Delete,       0,   IDC_BACK},
     {false, true,  false, false, kVK_Delete,       0,   IDC_FORWARD},
+#endif
     {true,  true,  false, false, 0,                'c', IDC_DEV_TOOLS_INSPECT},
     {true,  true,  false, false, kVK_ANSI_Period,  0,
      IDC_TOGGLE_SPEECH_INPUT},

webkit.patch

Index: WebCore/page/EventHandler.cpp
===================================================================
--- WebCore/page/EventHandler.cpp  (revision 143784)
+++ WebCore/page/EventHandler.cpp	(working copy)
@@ -3610,10 +3610,12 @@
     
     bool handledEvent = false;
 
+#if USE_IDIOTIC_SHORTCUT_KEYS
     if (event->shiftKey())
         handledEvent = page->goForward();
     else
         handledEvent = page->goBack();
+#endif
 
     if (handledEvent)
         event->setDefaultHandled();