Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_loader.cc

Index: chrome/browser/instant/instant_loader.cc
diff --git a/chrome/browser/instant/instant_loader.cc b/chrome/browser/instant/instant_loader.cc
index 4a474f7deca846bc56386e602e46218492b6a0c9..0202341308ff623dd721795e413ee45dbab316ad 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -94,6 +94,12 @@ class InstantLoader::WebContentsDelegateImpl
   // Message from the renderer determining whether it supports the Instant API.
   void OnInstantSupportDetermined(int page_id, bool result);
 
+  // Message from the renderer saying the web searchbox lost focus.
+  void OnWebSearchBoxBlur(int page_id);
+
+  // Message from the renderer saying the web searchbox received focus.
+  void OnWebSearchBoxFocus(int page_id);
+
   // Message from the renderer requesting the preview be shown.
   void OnShowInstantPreview(int page_id,
                             InstantShownReason reason,
@@ -208,6 +214,10 @@ bool InstantLoader::WebContentsDelegateImpl::OnMessageReceived(
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_SetSuggestions, OnSetSuggestions)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_InstantSupportDetermined,
                         OnInstantSupportDetermined)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_OnWebSearchBoxBlur,
+                        OnWebSearchBoxBlur);
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_OnWebSearchBoxFocus,
+                        OnWebSearchBoxFocus);
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_ShowInstantPreview,
                         OnShowInstantPreview);
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -239,6 +249,28 @@ void InstantLoader::WebContentsDelegateImpl::OnInstantSupportDetermined(
     MaybeSetAndNotifyInstantSupportDetermined(result);
 }
 
+void InstantLoader::WebContentsDelegateImpl::OnWebSearchBoxBlur(int page_id) {
+  DCHECK(loader_->preview_contents());
+  DCHECK(loader_->preview_contents_->web_contents());
+  content::NavigationEntry* entry = loader_->preview_contents_->web_contents()->
+                                        GetController().GetActiveEntry();
+  if (entry && page_id == entry->GetPageID()) {
+    MaybeSetAndNotifyInstantSupportDetermined(true);
+    loader_->controller_->OnWebSearchBoxBlur(loader_);
+  }
+}
+
+void InstantLoader::WebContentsDelegateImpl::OnWebSearchBoxFocus(int page_id) {
+  DCHECK(loader_->preview_contents());
+  DCHECK(loader_->preview_contents_->web_contents());
+  content::NavigationEntry* entry = loader_->preview_contents_->web_contents()->
+                                        GetController().GetActiveEntry();
+  if (entry && page_id == entry->GetPageID()) {
+    MaybeSetAndNotifyInstantSupportDetermined(true);
+    loader_->controller_->OnWebSearchBoxFocus(loader_);
+  }
+}
+
 void InstantLoader::WebContentsDelegateImpl::OnShowInstantPreview(
     int page_id,
     InstantShownReason reason,