DevTools: Allow PageUp to fall through text editor

third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js

Index: third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
diff --git a/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js b/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
index 2734f7844e7dffa77ee8322a1176be611da526fd..4f27a0a3805a1d69bb03aaf5dbc67c65481c5507 100644
--- a/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
+++ b/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
@@ -64,8 +64,8 @@ WebInspector.CodeMirrorTextEditor = function(options)
         "Down": "goLineDown",
         "End": "goLineEnd",
         "Home": "goLineStartSmart",
-        "PageUp": "goPageUp",
-        "PageDown": "goPageDown",
+        "PageUp": "smartPageUp",
+        "PageDown": "smartPageDown",
         "Delete": "delCharAfter",
         "Backspace": "delCharBefore",
         "Tab": "defaultTab",
@@ -289,6 +289,26 @@ CodeMirror.commands.dismiss = function(codemirror)
 }
 
 /**
+ * @return {!Object|undefined}
+ */
+CodeMirror.commands.smartPageUp = function(codemirror)
+{
+    if (codemirror._codeMirrorTextEditor.selection().equal(WebInspector.TextRange.createFromLocation(0, 0)))
+        return CodeMirror.Pass;
+    codemirror.execCommand("goPageUp");
+}
+
+/**
+ * @return {!Object|undefined}
+ */
+CodeMirror.commands.smartPageDown = function(codemirror)
+{
+    if (codemirror._codeMirrorTextEditor.selection().equal(codemirror._codeMirrorTextEditor.fullRange().collapseToEnd()))
+        return CodeMirror.Pass;
+    codemirror.execCommand("goPageDown");
+}
+
+/**
  * @param {string} quoteCharacter
  * @param {!CodeMirror} codeMirror
  * @return {*}