Flush form cache when next document is loaded to avoid Document leak.

This should fix a document leak from r270279.

BUG=392121

Review URL: https://codereview.chromium.org/380533003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282524 0039d316-1c4b-4281-b951-d872f2087c98

components/autofill/content/renderer/autofill_agent.cc

@@ -180,6 +180,11 @@ void AutofillAgent::DidFinishDocumentLoad(WebLocalFrame* frame) {
   ProcessForms(*frame);
 }
 
+void AutofillAgent::DidCommitProvisionalLoad(WebLocalFrame* frame,
+                                             bool is_new_navigation) {
+  form_cache_.ResetFrame(*frame);
+}
+
 void AutofillAgent::FrameDetached(WebFrame* frame) {
   form_cache_.ResetFrame(*frame);
 }

components/autofill/content/renderer/autofill_agent.h

@@ -59,6 +59,8 @@ class AutofillAgent : public content::RenderViewObserver,
   // content::RenderViewObserver:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidFinishDocumentLoad(blink::WebLocalFrame* frame) OVERRIDE;
+  virtual void DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
+                                        bool is_new_navigation) OVERRIDE;
   virtual void FrameDetached(blink::WebFrame* frame) OVERRIDE;
   virtual void FrameWillClose(blink::WebFrame* frame) OVERRIDE;
   virtual void WillSubmitForm(blink::WebLocalFrame* frame,

tools/telemetry/telemetry/core/backends/chrome/inspector_memory_unittest.py

@@ -17,6 +17,6 @@ class InspectorMemoryTest(tab_test_case.TabTestCase):
     self.Navigate('dom_counter_sample.html')
 
     counts = self._tab.dom_stats
-    self.assertEqual(counts['document_count'], 2)
-    self.assertEqual(counts['node_count'], 18)
+    self.assertEqual(counts['document_count'], 1)
+    self.assertEqual(counts['node_count'], 14)
     self.assertEqual(counts['event_listener_count'], 2)