[autofill] Show autofill popup when focusing a field by tapping near its edge.

components/autofill/content/renderer/page_click_tracker.cc

Index: components/autofill/content/renderer/page_click_tracker.cc
diff --git a/components/autofill/content/renderer/page_click_tracker.cc b/components/autofill/content/renderer/page_click_tracker.cc
index 4e54f9e638668a2b09a994b45e0a31e4fb37fc8c..17cefcbb7478b37ab5d0781fe8b639daf4f900dd 100644
--- a/components/autofill/content/renderer/page_click_tracker.cc
+++ b/components/autofill/content/renderer/page_click_tracker.cc
@@ -13,6 +13,7 @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebTextAreaElement.h"
 #include "third_party/WebKit/public/web/WebView.h"
+#include "ui/gfx/geometry/rect_f.h"
 
 using blink::WebElement;
 using blink::WebGestureEvent;
@@ -74,14 +75,17 @@ void PageClickTracker::DidHandleMouseEvent(const WebMouseEvent& event) {
     return;
   }
 
-  PotentialActivationAt(event.x, event.y);
+  PotentialActivationAt(gfx::RectF(event.x, event.y, 1, 1));
 }
 
 void PageClickTracker::DidHandleGestureEvent(const WebGestureEvent& event) {
   if (event.type != WebGestureEvent::GestureTap)
     return;
 
-  PotentialActivationAt(event.x, event.y);
+  PotentialActivationAt(gfx::RectF(event.x - event.data.tap.width / 2.0,
+                                   event.y - event.data.tap.height / 2.0,
+                                   event.data.tap.width,
+                                   event.data.tap.height));
 }
 
 void PageClickTracker::FocusedNodeChanged(const WebNode& node) {
@@ -108,13 +112,13 @@ void PageClickTracker::FocusChangeComplete() {
   was_focused_before_now_ = true;
 }
 
-void PageClickTracker::PotentialActivationAt(int x, int y) {
+void PageClickTracker::PotentialActivationAt(const gfx::RectF& region) {
   WebElement focused_element = render_view()->GetFocusedElement();
   if (focused_element.isNull())
     return;
 
   if (!GetScaledBoundingBox(render_view()->GetWebView()->pageScaleFactor(),
-                            &focused_element).Contains(x, y)) {
+                            &focused_element).Intersects(region)) {
     return;
   }