Improve Qt Creator indexing

Includes gn sources, headers and defines

Change-Id: I2abfb2c5238211a2305f6bdbcd082e832c048a2b
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/core/core.pro

@@ -41,7 +41,7 @@ core_api.depends = gn_run
 
 # A fake project for qt creator
 core_project.file = core_project.pro
-core_project.depends = core_headers
+core_project.depends = gn_run
 
 SUBDIRS += \
             core_headers \

src/core/core_common.pri

@@ -5,8 +5,4 @@ TARGET = QtWebEngineCore
 QT += qml quick webchannel
 QT_PRIVATE += quick-private gui-private core-private webenginecoreheaders-private
 
-# Make QtCreator happy.
-CHROMIUM_SRC_DIR = $$QTWEBENGINE_ROOT/$$getChromiumSrcDir()
-INCLUDEPATH += $$CHROMIUM_SRC_DIR
-
 qtHaveModule(positioning):QT += positioning

src/core/core_module.pro

@@ -130,9 +130,6 @@ icu.files = $$OUT_PWD/$$getConfigDir()/icudtl.dat
 }
 
 OTHER_FILES = \
-    $$files(../3rdparty/chromium/*.h, true) \
-    $$files(../3rdparty/chromium/*.cc, true) \
-    $$files(../3rdparty/chromium/*.mm, true) \
     $$files(../3rdparty/chromium/*.py, true) \
     $$files(../3rdparty/chromium/*.gyp, true) \
     $$files(../3rdparty/chromium/*.gypi, true) \

src/core/core_project.pro

 TEMPLATE = lib
+# Fake project to make QtCreator happy.
 
-include(core_chromium.pri)
+include(core_common.pri)
+
+linking_pri = $$OUT_PWD/$$getConfigDir()/$${TARGET}.pri
+
+!include($$linking_pri) {
+    error("Could not find the linking information that gn should have generated.")
+}
+
+CHROMIUM_SRC_DIR = $$QTWEBENGINE_ROOT/$$getChromiumSrcDir()
+INCLUDEPATH += $$CHROMIUM_SRC_DIR \
+               $$OUT_PWD/$$getConfigDir()/gen
+
+SOURCES += $$NINJA_SOURCES
+HEADERS += $$NINJA_HEADERS
+DEFINES += $$NINJA_DEFINES