Update V8 to r5091 as required by WebKit r63859.

Change-Id: I8e35d765e6f6c7f89eccff900e1cabe2d5dd6110

3 files changed, 51 insertions, 2 deletions

diff --git a/include/v8-debug.h b/include/v8-debug.h
index c53b6346..414fd862 100644
--- a/include/v8-debug.h
+++ b/include/v8-debug.h
@@ -76,7 +76,8 @@ enum DebugEvent {
   NewFunction = 3,
   BeforeCompile = 4,
   AfterCompile  = 5,
-  ScriptCollected = 6
+  ScriptCollected = 6,
+  BreakForCommand = 7
 };
 
 
@@ -172,6 +173,13 @@ class EXPORT Debug {
      */
     virtual Handle<Value> GetCallbackData() const = 0;
 
+    /**
+     * Client data passed to DebugBreakForCommand function. The
+     * debugger takes ownership of the data and will delete it even if
+     * there is no message handler.
+     */
+    virtual ClientData* GetClientData() const = 0;
+
     virtual ~EventDetails() {}
   };
 
@@ -248,6 +256,12 @@ class EXPORT Debug {
   // Break execution of JavaScript.
   static void DebugBreak();
 
+  // Break execution of JavaScript (this method can be invoked from a
+  // non-VM thread) for further client command execution on a VM
+  // thread. Client data is then passed in EventDetails to
+  // EventCallback at the moment when the VM actually stops.
+  static void DebugBreakForCommand(ClientData* data = NULL);
+
   // Message based interface. The message protocol is JSON. NOTE the message
   // handler thread is not supported any more parameter must be false.
   static void SetMessageHandler(MessageHandler handler,
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index 3e1952c7..c99eb0d9 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -258,6 +258,12 @@ class V8EXPORT HeapGraphNode {
    */
   Handle<String> GetName() const;
 
+  /**
+   * Returns node id. For the same heap object, the id remains the same
+   * across all snapshots.
+   */
+  uint64_t GetId() const;
+
   /** Returns node's own size, in bytes. */
   int GetSelfSize() const;
 
@@ -290,6 +296,16 @@ class V8EXPORT HeapGraphNode {
 };
 
 
+class V8EXPORT HeapSnapshotsDiff {
+ public:
+  /** Returns the root node for added nodes. */
+  const HeapGraphNode* GetAdditionsRoot() const;
+
+  /** Returns the root node for deleted nodes. */
+  const HeapGraphNode* GetDeletionsRoot() const;
+};
+
+
 /**
  * HeapSnapshots record the state of the JS heap at some moment.
  */
@@ -302,7 +318,10 @@ class V8EXPORT HeapSnapshot {
   Handle<String> GetTitle() const;
 
   /** Returns the root node of the heap graph. */
-  const HeapGraphNode* GetHead() const;
+  const HeapGraphNode* GetRoot() const;
+
+  /** Returns a diff between this snapshot and another one. */
+  const HeapSnapshotsDiff* CompareWith(const HeapSnapshot* snapshot) const;
 };
 
 
diff --git a/include/v8.h b/include/v8.h
index ca4a247f..9e4cebb7 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -694,6 +694,13 @@ class V8EXPORT Message {
   Handle<Value> GetScriptData() const;
 
   /**
+   * Exception stack trace. By default stack traces are not captured for
+   * uncaught exceptions. SetCaptureStackTraceForUncaughtExceptions allows
+   * to change this option.
+   */
+  Handle<StackTrace> GetStackTrace() const;
+
+  /**
    * Returns the number, 1-based, of the line where the error occurred.
    */
   int GetLineNumber() const;
@@ -2459,6 +2466,15 @@ class V8EXPORT V8 {
   static void RemoveMessageListeners(MessageCallback that);
 
   /**
+   * Tells V8 to capture current stack trace when uncaught exception occurs
+   * and report it to the message listeners. The option is off by default.
+   */
+  static void SetCaptureStackTraceForUncaughtExceptions(
+      bool capture,
+      int frame_limit = 10,
+      StackTrace::StackTraceOptions options = StackTrace::kOverview);
+
+  /**
    * Sets V8 flags from a string.
    */
   static void SetFlagsFromString(const char* str, int length);