[BlackBerry] Change the WebPage::load*() functions to use std::string instead of char*

• Component: WebKit Misc.
• Status: RESOLVED INVALID

[Konrad Piascik]

This includes the following 4 functions and their call sites.

void load(const char* url, const char* networkToken, bool isInitial = false);
void loadExtended(const char* url, const char* networkToken, const char* method, Platform::NetworkRequest::CachePolicy = Platform::NetworkRequest::UseProtocolCachePolicy, const char* data = 0, size_t dataLength = 0, const char* const* headers = 0, size_t headersLength = 0, bool mustHandleInternally = false);
void loadFile(const char* path, const char* overrideContentType = "");
void loadString(const char* string, const char* baseURL, const char* contentType = "text/html", const char* failingURL = 0);