Navigation transitions (web to native app): Pass data after starting provisional load (Chrome side)

content/browser/transition_request_manager.h

Index: content/browser/transition_request_manager.h
diff --git a/content/browser/transition_request_manager.h b/content/browser/transition_request_manager.h
index 3db4d87e64d91ceb461b1bb20c66599bab38fb39..65b57924134e790207ed6297c7abdd13741e77eb 100644
--- a/content/browser/transition_request_manager.h
+++ b/content/browser/transition_request_manager.h
@@ -13,6 +13,7 @@
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
+#include "content/public/common/transition_element.h"
 #include "ui/gfx/geometry/rect.h"
 #include "url/gurl.h"
 
@@ -33,8 +34,7 @@ struct TransitionLayerData {
 
   std::string markup;
   std::string css_selector;
-  std::vector<std::string> names;
-  std::vector<gfx::Rect> rects;
+  std::vector<TransitionElement> elements;
   scoped_refptr<net::HttpResponseHeaders> response_headers;
   GURL request_url;
 };
@@ -57,10 +57,11 @@ class TransitionRequestManager {
       std::vector<GURL>& entering_stylesheets,
       const GURL& resolve_address);
 
-  // Returns whether the RenderFrameHost specified by the given IDs currently
-  // has any pending transition request data. If so, we will have to delay the
-  // response until the embedder resumes the request.
-  CONTENT_EXPORT bool HasPendingTransitionRequest(
+  // Get pending transition request data from RenderFrameHost specified by the
+  // given IDs and return true if the data exists. For web to web transition, we
+  // will have to delay the response until the embedder resumes the request if
+  // the data exists.
+  CONTENT_EXPORT bool GetPendingTransitionRequest(
       int render_process_id,
       int render_frame_id,
       const GURL& request_url,
@@ -74,8 +75,7 @@ class TransitionRequestManager {
       const std::string& allowed_destination_host_pattern,
       const std::string& css_selector,
       const std::string& markup,
-      const std::vector<std::string>& names,
-      const std::vector<gfx::Rect>& rects);
+      const std::vector<TransitionElement>& elements);
   CONTENT_EXPORT void AddPendingTransitionRequestDataForTesting(
       int render_process_id,
       int render_frame_id);
@@ -83,6 +83,10 @@ class TransitionRequestManager {
   CONTENT_EXPORT void ClearPendingTransitionRequestData(int render_process_id,
                                                         int render_frame_id);
 
+  // The maximum number of elements is meant to avoid passing arbitrarily large
+  // amount of objects across the IPC boundary.
+  static const int kMaxNumOfElements = 1024;
+
  private:
   class TransitionRequestData {
    public:
@@ -91,8 +95,7 @@ class TransitionRequestManager {
     void AddEntry(const std::string& allowed_destination_host_pattern,
                   const std::string& selector,
                   const std::string& markup,
-                  const std::vector<std::string>& names,
-                  const std::vector<gfx::Rect>& rects);
+                  const std::vector<TransitionElement>& elements);
     bool FindEntry(const GURL& request_url,
                     TransitionLayerData* transition_data);
 
@@ -104,14 +107,12 @@ class TransitionRequestManager {
       std::string allowed_destination_host_pattern;
       std::string css_selector;
       std::string markup;
-      std::vector<std::string> names;
-      std::vector<gfx::Rect> rects;
+      std::vector<TransitionElement> elements;
 
       AllowedEntry(const std::string& allowed_destination_host_pattern,
                    const std::string& css_selector,
                    const std::string& markup,
-                   const std::vector<std::string>& names,
-                   const std::vector<gfx::Rect>& rects);
+                   const std::vector<TransitionElement>& elements);
       ~AllowedEntry();
     };
     std::vector<AllowedEntry> allowed_entries_;