Save some gcc footprint (15 KB) in ExplodedFrameState.

Inlining the assignment and copy constructor for a class
like ExplodedFrameState exploded the machine code in stl::vector.

gcc:
Total change: -14969 bytes
==========================
  2 added, totalling +504 bytes across 1 sources
  1 removed, totalling -3387 bytes across 1 sources
  0 added, totalling 0 bytes across 0 sources
  3 shrunk, for a net change of -12086 bytes (14716 bytes before, 2630 bytes after) across 2 sources

It also helps for clang which normally ignores programmers hints to inline anyway:
clang:
Total change: -918 bytes
========================
  1 added, totalling +263 bytes across 1 sources
  3 removed, totalling -1098 bytes across 2 sources
  2 grown, for a net change of +161 bytes (1822 bytes before, 1983 bytes after) across 1 sources
  1 shrunk, for a net change of -244 bytes (1401 bytes before, 1157 bytes after) across 1 sources

BUG=

Review URL: https://codereview.chromium.org/400923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284424 0039d316-1c4b-4281-b951-d872f2087c98

content/common/page_state_serialization.cc

@@ -696,9 +696,34 @@ ExplodedFrameState::ExplodedFrameState()
       referrer_policy(blink::WebReferrerPolicyDefault) {
 }
 
+ExplodedFrameState::ExplodedFrameState(const ExplodedFrameState& other) {
+  assign(other);
+}
+
 ExplodedFrameState::~ExplodedFrameState() {
 }
 
+void ExplodedFrameState::operator=(const ExplodedFrameState& other) {
+  if (&other != this)
+    assign(other);
+}
+
+void ExplodedFrameState::assign(const ExplodedFrameState& other) {
+  url_string = other.url_string;
+  referrer = other.referrer;
+  target = other.target;
+  state_object = other.state_object;
+  document_state = other.document_state;
+  pinch_viewport_scroll_offset = other.pinch_viewport_scroll_offset;
+  scroll_offset = other.scroll_offset;
+  item_sequence_number = other.item_sequence_number;
+  document_sequence_number = other.document_sequence_number;
+  page_scale_factor = other.page_scale_factor;
+  referrer_policy = other.referrer_policy;
+  http_body = other.http_body;
+  children = other.children;
+}
+
 ExplodedPageState::ExplodedPageState() {
 }
 

content/common/page_state_serialization.h

@@ -58,7 +58,12 @@ struct CONTENT_EXPORT ExplodedFrameState {
   std::vector<ExplodedFrameState> children;
 
   ExplodedFrameState();
+  ExplodedFrameState(const ExplodedFrameState& other);
   ~ExplodedFrameState();
+  void operator=(const ExplodedFrameState& other);
+
+private:
+  void assign(const ExplodedFrameState& other);
 };
 
 struct CONTENT_EXPORT ExplodedPageState {